Hfss port impedance. However, in HFSS, version 10, the port impedance is 50 ohm.

Hfss port impedance A Terminal line may still be defined, but only one per port. The simulation (ports only, 3. Joined Feb 28, 2008 Learn more about Ansys products & speak to a Senior Engineer, reach out at https://fluidcodes. Parameters-----filename . e split structure with 1/16 left, the multiplyer should be 1/16=0. Strictly speaking, the concepts of port impedance and internal resistance of a voltage source differ Re: How does the HFSS calculate the impedance of a lumped po HFSS does not calculate the port impedance of a lump port. To plot the impedance,In the project manager window right mouse click on Results, go to terminal solution data report. For starters, I just want to have two conductors in air and want to know the input impedance. From the S11 plot i find two resonances at about 8GHz and wave port is used for external feeding as given in hfss manual. I am simulating the capacitance between two metal traces. g. :razz: Port surface area takes on the material characteristics of the materials which touch its face Port boundaries take on the boundary characteristics of the boundaries which share its edges Radiation boundaries are the one exception Your power issue is due to the complex load you have on the port. Some of the examples are planar phased arrays and frequency selective surfaces when these may be idealized as infinitely large. To create the impedance boundary on the PML object: 1. Graphically pick the top face of the PML object 3. A new window pops up, in the category, select Terminal Port Zo and after this select quantity and function and click on a new report to see the impedance plot. R The proposed well-matched and balanced impedance matching approach is proven by the HFSS (3D High Frequency Simulation Software) simulation and structure measurements. A lumped port will be used for the dipole model. The steps are to set the X, Y, Z of the integration line as the starting coordinates (7. You got a wrong result, maybe you made a wrong definition of CPW port (waveport) in HFSS. Skip to main content Continue to Site u should use some "post processing" to normalize the S-param to some impedance (say 50 ohm) or u can simply use the formula conversion from reflection coefficient to normalized S-param, these formulas can be found in many books like microwave cpw port hfss hi, I have a similar probem. It calculates the impedance only for a waveguide port. 如何在HFSS中獲得差分對的TDR該視頻顯示了從S參數模擬中獲得差分對的TDR的流程。This video shows the flow to get TDR of differential pair How can I define the impedance of a lumped port in HFSS to couple an IC that has an impedance of 20-150i ohms to design an antenna that has the conjugate impedance of the IC to achieve the best coupling. But when I am setting the range in HFSS V14, then after the starting of the Hfss# class ansys. HFSS Port Selection Example: Ports inside Model Volume, part 1 Microstrip Port on RF Board Hello guys, I'm trying to calculate port impedance of the antipodal vivaldi antenna(AVA). Assigning a port is an important task for HFSS design and there are three types of Calculating Characteristic Impedance • Each port in a structure being analyzed can be viewed as a cross-section of a transmission line. You can check the actual port impedance by carrying out solve port only firstly and then run the full wave solution. Fig. However, in HFSS, version 10, the port impedance is 50 ohm. 3) In both cases use the ZPI impedance calculation in which the arrow defines just the +/- sign of the field (and not the Z0 calculation, so it does not really matter to which ground it is pointing). This excitation is commonly used when the far field region is of primary interest. Joined Sep 5, 2006 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Visit site Activity points Port surface area takes on the material characteristics of the materials which touch its face Port boundaries take on the boundary characteristics of the boundaries which share its edges Radiation boundaries are the one exception The environment variable ZERO_ORDER_ABC_ON_PORT = 1 can set them to 377 ohms instead Differences exist HFSS_GS_2020R2_EN_LE6_Port_Basics - Free download as PDF File (. Port 1 is excited by a signal of one watt, and the other ports are set to zero watts. But the lumped port will not give the impedance result, and I have to provide impedance for the S-parameter results. Hi Guys, I am simulating a loop antenna with HFSS. 1 to 10. Can I set the port imepdance to be 20-j160 which is the impedance of the chip? measure antenna impedance you can measure the antenna impedance using the value of s11, simply by determining the input impedance from s11, normalizing, placing the normalized impedance on smith chart then moving toward the load by a length equal to that of the feeding line. Zo > Zo for CPW mode Waveguide-like frequency dependence in Zo 10 CPW Lumped Ports: Layout and Sizing HFSS v8 Training Lumped Ports can be used for Internal CPW excitations Also referred to as Gap Source Ports since they excite uniform ‘gap-like’ E fields, yet still permit S-parameter output Lumped port boundaries are conductive where In Example –Endfire Antenna Array of Ansoft HFSS v10 User’s Guide, why to assign a Impedance Boundary on the face of PML . I think in HFSS, if you are using Driven Modal and Waveport, the HFSS will By selecting “I consent” below, you consent to receive marketing communications (via mail, email, telephone, or text (i. As with any port in HFSS, they are surfaces where incident and absorbed energy is recorded by the simulation, allowing for one to obtain several different electrical properties of the design being simulated. In the first setup, I have only 2 ports at each end of traces. My line impedance result for your dimensions is around 45 Ohm, for pure CPW on the top layer with not metal on PCB Bottom layer. So, I have difficulty on setting the HFSS Lumped Port Impedance for Matching. In the lumped port properties, in the “Modes” tab, set the “Integration line” between the coil terminals in the middle of the rectangle. , SMS) message at the number you provided) from Lennar Homes and A set of closed form expressions based on cavity model are proposed to investigate the effect of composite and suspended substrate on the input impedance of an equilateral triangular patch Characteristic impedance is not uniquely defined for non-TEM modes -- many textbooks will use the "wave impedance" definition, however, this doens't take into account the Ok. 110. Lumped RLC Elements in HFSS Version 8 Page 9 Figure 10: Magnitude of S Yes driven terminal should work (HFSS > Solution Type > Terminal). Strictly speaking, the concepts of port impedance and internal resistance of a voltage source differ The Floquet port is one of the excitation types offered by Ansys HFSS in Ansys Electronics Desktop (AEDT) for electromagnetic simulations. Lumped ports require a user-specified impedance and are used for single following tasks in HFSS: • Create the geometric models. Sort by date Sort by votes Aug 12, 2021 #2 V. Now just cover the submerged part of rod with soil material as shown in figure below. I use the driven mode and lumped port. Plot smith chart to get input impedance. the difference between those two ports is type of feeding. wave port hfss For lump port excitation, you need to draw a strip to merge the two grounds and signal line together. 6GHz. I attached an HFSS project file here. Thi Dear all, I've previously started (and closed) a thread in this forum (06-04-11) about the characteristic impedance calculation of rectangular waveguide in HFSS. [我有以下几个疑问，请高手指点： 1. which port impedances I should choose to compare?Thanks!!! i have designed an antenna and viewed its gain plot by using HFSS software but i'm getting high gain not at desired operating frequency, i think this is because of impedance mismatch problem, could someone please help me regarding this of getting high gain at desired operating frequency. Joined Sep 5, 2006 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Visit site Activity points slotline calculator I want to use HFSS to simulate a slot line structure with the FR4 material as a transmission line to get the characteristic impedance and effective dielectric constant. com/calculato Hfss# class ansys. 5 GHz. A short description of the network will be printed out if entered onto the command line In the former, I have a Wave Port consisting of a 2D Rectangle. The difference between the two should be small in the order of few ohms at max, that if your HFSS setup is correct. But I don't know how to choose them in different ways. One discrepancy I can think of is the number of modes allowed on the surface. Thanks Chinmay This example can be solved using Ansoft Optimetrics in combination with HFSS. Again, [Zin](1,1) will be the estimate for input impedance. Impedance, Polarization, Imp. port 55 Lumped Port Impedance - User Specified The complex impedance Zs, defined when the port gets created, serves as the reference impedance of the S-matrix of the lumped port. After a solution is generated, port 2 is Hello! I am designing a microstrip patch antenna using Ansys HFSS. 6 should have a higher characteristic impedance. In the case of waveguide port: Waveguide port generaly needs some The port is defined on a rectangle as it has to be (Width = ~ 7g and height > 4h or 4g). But as you know, AVA has metal-substrate-metal structure. In lumped port we can assign the impedance (combination of resistance and reactance ) cpw port hfss hi, I have a similar probem. I would like to simulate a two-wire transmission line. This paper Title: HFSS Training: Waveguide Coupler Author: srrousse Keywords: hfss, macro, training, Created Date: 1/31/2007 10:37:07 PM Does anyone have an idea about the wave port or lumped port in hfss ,which should be used especially for microstrip patch antenna in uwb range i. By doing The proper Wave Port impedance multiplier needs to be applied when using symmetry planes. And I choose the option, solve ports only in the setup expecting the port impedance, Zpi, Zvi and Zpv to be correspondace. I tried PEC port caps as well as having the air box terminated at the ports. Therefore you need the vias crossing the port and shorting the grounds (now you're back with two nets in the port and a CPW excitation). Please consult the help manual to learn A - Z of HFSS. The impedance Zs has the To bring the periodicity in infinite arrays, coupled boundaries and Floquet port must be assigned in HFSS inside Ansys Electronics Desktop. 9, 0, 0) But in th I am trying to design a circularly symmetric high impedance surface. After i simulated it first time, i received all the s-parameters and i checked at fields->edit sources that only port 1 had excitation power amplitude of 1W and all the others had zero. impedance. Floquet Ports in HFSS The Floquet port in HFSS is used exclusively with planar-peri In this video, the simulation method of the helical antenna (designed in axial mode) using Ansys HFSS is explained. Ensure that the wave port is sufficiently large to encompass the bulk of the modal fields. This example can be solved using Ansoft Optimetrics in combination with HFSS. The port width affects the port impedance and the propagating modes. If the chip's impedance is 20-j160, the antenna designed should have a impedance of 20+j160 for max power transfor. For instance,I want to simulate a microstrip line which's impedance is 50ohm in HFSS. Thus, you will be able to switch this option after your simulation and compare its results without changing the initial simulation settings. 24mm). The impedance matching of the stripline is primarily influenced by W2 (feed region width), W5 (port width), and solder pad dimensions. After an initial simulation, an optimization was set up, in which a goal was set to tune the characteristic impedance of the Your power issue is due to the complex load you have on the port. hattie113. tq. 如何利用HFSS有效地計算差分對模型HFSS為任意3D結構提供高精度寬帶計算能力，在本視頻中，我將向您展示如何使用HFSS I want to set a circle as a lumped port. So one should Learn the difference between lumped ports and wave ports in HFSS, how to use them for different applications and structures, and how to specify their impedance and placement. And does any one have the idea In this course we will introduce the Floquet port and its key features followed by analysis of an example. Terminate the ports in the schematic with your lumped elements and define the system ports, then assign a sinusoidal power excitation to the system ports hfss port definiton If the wave impedance of the port is all you need, just solve the port only. Create Lumped port on port sheet as shown below. The model is excited by lumped port (0. Multiplier A port is an aperture through which guided electromagnetic field energy is injected into a 3D HFSS model. In many IEEE papers i have seen graph plotted in HFSS about impedance vs frequency. hfss lump port If the size of the lumped size is too big, you may have to change the dimension of the simulated structure in order to leave the space to the port. Hope this helped. So I plan to add an inductor to cancel out this Please consult the help manual to learn A - Z of HFSS. 00 Differential Microstrip Curve Info ,Diff1)) 3GHz IGHz 32GHr 110. Read less The easiest way to find Impedance of tranmission line is just define port and calculate port only solution, imho. Since the diameter of the loop antenna is very small, it does not resonant at the working frequency. Select the menu item Edit > Select > Faces 2. Insert a new 'circuit' design into your AEDT project - then you can drag and drop your HFSS model with lumped port into the circuit schematic to create a dynamically linked HFSS-Circuit model. However, the port impedance setting of HFSS only allows me to choose 50 ohms, not the complex value of 12+j140. Provides the HFSS application interface. A port. In your case this impedance is the wave impedance of the fundamental mode. And does any one Flexible and wearable electronics are experiencing rapid growth due to the increasing demand for multifunctional, lightweight, and portable devices. Now that we have terminated the line into a 50 Ohm port instead of running it into a PML, this value is no longer the transmission line impedance Zline=sqrt(L'/C') !! The input impedance circles around ~ 52 Ohm in Smith chart, resulting in the very typical pattern that you showed. The differential ports do not accept the complex port impedance. Tapered microstrip Balun is used as an impedance transformer network in feeding sections of spiral antennas as it provides impedance transformation over a large range of frequency and also serves the purpose of conversion of single ended port to a symmetric port. Anyone else had experience checking via connectivity in HFSS ? - - - Updated - - - I have changed the material for both via to use FR4 epoxy, but the s-parameter magnitude and phase plots are still in a mess. Name the port source and leave the default values for impedance. Read the port tutorial carefully and try it again. CDWest Newbie level 2. I have experienced that waveport is good and results better and also provides us with good port impedance analysis. However, for a 50-Ohm CPW I got really strange results (Zvi = 350 Ohm, Zpi=450 -j290 Ohm, Zpv=1. This document provides an overview of lumped ports and wave ports in ANSYS HFSS. the port fields of the lump port is quite Download scientific diagram | Port definitions used in CST (upper) and in HFSS (lower) III. So I plan to add an inductor to cancel out this def hfss_touchstone_2_network (filename: str)-> Network: """ Creates a :class:`~skrf. Based on the recommendation of HFSS CPW tutorial guide, the size of the port has been decided to be width of 654um and length more than 2000um. Actually, from the manual of the HFSS chap. wave port In this video, a 50 Ω microstrip line is designed and its step by step process is explained. Link to the calculator https://www. wave port in HFSS and is discussed in detail next. In hfss ,i set the impedance of the lumped port placed at one end of the microstrip-line to be 50ohms. com/ A Terminal line may still be defined, but only one per port. Read less 94um and the gap 62um. smart software for high-frequency design 5-30 HFSS Port Selection: Standard or Gap Source? When would you choose to use a Gap Source Port over a Standard Port? When the model has tightlyspaced lines When ‘backing’ the port would be too disruptive of internal fields When a Both ports have been renormalized to 50 ohms impedance. I think you'll get a real characteristic impedance that you're expecting cheers! Re: How does the HFSS calculate the impedance of a lumped po HFSS does not calculate the port impedance of a lump port. In this video, design procedure of CPW line is explained and 50 Ω line is designed using HFSS. 5cm waveguide filled with Epoxy, I calculated a Z0 = 187Ohms and on HFSS I found around 60Ohms. Impedance and Propagation constants are not computed Port boundaries are simplified to support simple uniform field distributions. txt) or read online for free. aedt. io. I plot the Z11, but I am not sure that is it load impedance (HFSS model Insert a new 'circuit' design into your AEDT project - then you can drag and drop your HFSS model with lumped port into the circuit schematic to create a dynamically linked HFSS-Circuit model. I am using the wave port to excite my patch antenna. hfss zpi hello everyone We can get several port impedances in HFSS,like Zpi,Zpv and Zvi which are usually different. However, HFSS returns to me a negative Re(Y_11) (or equivalently, a negative Re(Z_11)) at the resonant frequency, thus predicting a negative quality factor (unphysical). we can assign wave port for micro strip transmission lines also. e split structure with 1/16 left, the multiplyer should be This value changes with frequency because the wave impedance changes with frequency. Then the reference impedance is just an impedance that S matrices are referred to (transmission line impedance, port impedance and other names). H. 若需要 whose source impedance is essentially matched to 50Ω. an antenna fed with a lumped port) is? An impedance for the lumped port must be specified, so is it normally done by computing the real and imaginary components of S11 and Differential impedance: 95Ωat 0. the characteristic of port is 50ohm. In many cases, the default background boundary condition needs to be replaced by a radiation surface. so can anybody tell me how to plot that kind of graphs in HFSS 11? hope to get some reply . It discusses that ports are excitations used to compute network parameters and field information. Create a monopole on a ground plane as shown below. I imagine there must be other wave port hfss For lump port excitation, you need to draw a strip to merge the two grounds and signal line together. The conclusion at that time was that the results given by HFSS were not in accordance with the classical electromagnetic books (Pozar, Harrington, Colin, etc. hfss. After HFSS EM sim, I extract the snp and put them in ADS to extract the parasitic capacitor from 2 port Y I am confused by a RFID antenna simulation problem for many days. You do not need to define the port size because it is naturally defined by the cross-section. Any comments would be helpful, thanks Hi Guys, I am simulating a loop antenna with HFSS. Best 2) Field plots and S-parameter results were analyzed to verify the design met expectations. For the conjugate matching, I need to set the port impedance 12+j140. This class allows you to create an floquet port hfss A guide to Floquet port in HFSS v11. Terminate the ports in the schematic with your lumped elements and define the system ports, then assign a sinusoidal power excitation to the system ports For instance for a 10x2. pdf), Text File (. Jan 19, 2011 #1 C. From Z11 I can see the input impedance is 818-158j. It would be nice if I could put either a load or another port at the far end of the transmission line. Thanks, Aman Meanwhile, the central junction Q1_rect_jj is rendered as both a port and an inductor with an impedance of 50 Ohms and an inductance of 10 nH, respectively. The ports setting in HFSS is treated in this way: outward of the port is connected with transmission line, the characteristic impedance of the transimission line is Z0(which you change this value and normalize it to any value you want). If the defined port is too narrow more Port characteristic impedance is strongly depend on Port size definition. to yield the same phase velocity between 10 and 450 GHz with a fractional uncertainty less than ±1% under a matched port impedance termination. After an initial simulation, an optimization was set up, in which a goal was set to tune the characteristic impedance of the How to design cpw fed port in HFSS? Question. The final field solution computed must match the 2D field pattern at each port. This is just a guess, but if correct, it would mean that the impedance boundary is more trustworthy. Keep in mind that port renormalization is a Post Processing effect. In the “General” and “Post processing” tabs, set the “Full port impedance” to 50 Mom. CPW Wave Ports: Impedance and Calibration HFSS v 8 Training Impedance Lines Optional for wave ports, but if Zpv and Zvi desired, should be drawn Extend from either side ground to proximal point on trace, colinear with top edge of substrate Port width should be no less than 3 x the overall CPW width, or 3 x (2 g + w) Port height should be no less than 4 x the dielectric The Terminal renormalizing impedance has taken to be 50Ω and the solution frequency has taken to be 1. only simulation is ran and the average characteristic impedance. The link for the online calculator used is https://www. e. I cannot help you with HFSS port setup, but others who are more familiar with HFSS might jump in. 27 所示的后处理界面，选择 Renormalize All Modes 项，在 Full Port Impedance 栏输入 50 ，表示需要对 S 参数进行归一化处理，且 归一化的阻抗为 50 。Deembed Settings 是端口平移设置，选中 Deembed 复选框即可在 其右侧输入端口平移的距离，需要注意的是，此处输入正数表示 Zo > Zo for CPW mode Waveguide-like frequency dependence in Zo 10 CPW Lumped Ports: Layout and Sizing HFSS v8 Training Lumped Ports can be used for Internal CPW excitations Also referred to as Gap Source Ports since they excite uniform ‘gap-like’ E fields, yet still permit S-parameter output Lumped port boundaries are conductive where GBCPWG field distribution in HFSS port field display. This method can be applied to any type of antenna. It is of note that HFSS, along with all other field solvers, consider a matched S parameter to be matching to the real part of the impedance only. Please find the touchstone file from the HFSS Spiral Inductor Example here: Spiral_Inductor_Microstrip_Spiral. HFSS Port Selection Example: Ports inside Model Volume, part 1 Microstrip Port on RF Board –Layered Impedance Surface –Radiation: By default HFSS assumes everything outside of the user geometry (Background) is defined as a Perfect Electric Surfaces. Because the substrate is thick silicon, lumped port seem to be the better choice. You can also specify a port mesh refinement under the analysis setup options -- I think the default is 2%, but I usually set it to 0. They are also used to describe the small-signal response of non-linear networks. pdf. Hope it helps. , are normalised to specific port impedances. HFSS will give you the answer as Z0 value in Matrix Data The Impedance will be equal (in general case) to a relation between maximums of tangential components of E and H fields along any line in z direction. 00 width [uml 100. In lumped port we can assign the impedance (combination of resistance and reactance ) Could anyone please simulate a coax based on the equation Zo = 138/√er * log(b/a) on HFSS and return the port impedance (use filling other than air). If you are using lump port, maybe it can't work out since lump port don't have deembed setting. By default, the probe stands 5 μm above a CPW containing the DUT (DUT CPW). you will go through this kind of steps. Joined Feb 28, 2008 This example demonstrates how to use skrf to renormalize a Network’s s-parameters to new port impedances. Wave port is also there. I and P , following the Zpi, Zpv and Zvi impedance definitions found in the HFSS Help. HFSS Port Selection Example: Ports inside Model Volume, part 1 Microstrip Port on RF Board In the case of discrete port: Define a discrete port impedance directly in port setting (only real valued impedance is support). It sounds like your line is not (impedance) matched to the port. when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with 50 and put that value on renom impedance field. 6 GHz with f_c=6. The conversion from unbalanced to balanced line relies on a gradual change of cross section of the line. It would be interesting to know how you measure this thing. The Terminal renormalizing impedance has taken to be 50Ω and the solution frequency has taken to be 1. Just not sure the intension of HFSS for including it the way that it is written. I want to match this differential port impedance with a frequency-dependent complex impedance using the parametric I am designing a microstrip patch antenna using Ansys HFSS. Each mode incident on a port contains one watt of time-averaged power. following tasks in HFSS: • Create the geometric models. |S11| too large I'm modelling a 50 Ohm coaxial cable in HFSS that is excited with a waveport and terminated with a 50 Ohm impedance boundary. Parameters-----filename This periodic structure was simulated by Ansys HFSS with floquet port excitation and periodic boundary conditions. Network` object from a a HFSS-style Touchstone file. hfss_full_bo. • HFSS assumes that each port you define is connected to a semi-infinitely long waveguide that has the same cross section as the Wave Port. Some examples are: o A dual channel insertion loss measuring system (ratio). I have experienced that waveport is good and results better and also provides us with good port impedance If it is 3-port network, you shunt the port 2 on port 1 writing INF in its diagonal, and Zero to 21 and 12 components. • Run HFSS simulations. To facilitate the measurement with the G-S-G probe, each coil of the transformer has one port grounded, making the transformer a two-port device. When solving for S-parameters, the simulator assume s that the structure is excited by I am wondering is the Differential Terminal Port Impedance equal to the odd impedance and the common terminal port impedance equal to the even mode impedance in the couple line. There are two types: Standard Ports: The aperture is solved using a 2D eigensolution which locates all requested propagating modes Characteristic impedance is calculated from the 2D solution hfss port definiton If the wave impedance of the port is all you need, just solve the port only. If you want to plot the PORT IMPEDANCE versus FREQUENCY, then you can plot "Port Zo" versus frequency ( it is available in one of the options) if Hmm, ok. For now, I can just shut off the Port Impedance output from HFSS. Circuit solvers consider a match to be the complex conjugate of the load. 5V incident voltage which equals to 1V of source in experiment ). for example wave guides . I am confused by a RFID antenna simulation problem for many days. Terminate the antenna with a when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with 50 and put that value on renom impedance field. The port impedance and total loss were also checked. This part shows the impedance matching im Basic Cavity Resonance Technique for HFSS V6. Skip to main content Continue to Site u should use some "post processing" to normalize the S-param to some impedance (say 50 ohm) or u can simply use the formula conversion from reflection coefficient to normalized S-param, these formulas can be found in many books like microwave （4）再次单击下一步按钮，打开图 5. The port impedance in this case is 188, the impedance of the slab dielectric wave guide. HFSS Lumped Port Impedance for Matching. I did and it return the right value. when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with 50 and put that value on renom impedance field. This kind of port is used exclusively with planar-periodic structures. The blue, black, and green lines are the impedance If I set my wave port with the size of HFSS provided formula, it's way wider than half wavelength,(roughly 2. V2X require these patch antennas implemented in array for having more directional gain, impedance bandwidth, beam steering The easiest way to find Impedance of tranmission line is just define port and calculate port only solution, imho. My suggestion alluded to setting the port impedance to I am wondering is the Differential Terminal Port Impedance equal to the odd impedance and the common terminal port impedance equal to the even mode impedance in the couple line. Adapted from model by Roy Wastie Sam Henry 5 July 2017. By doing Impedance parameters or Z-parameters (the elements of an impedance matrix or Z-matrix) are properties used in electrical engineering, electronic engineering, and communication systems engineering to describe the electrical behavior of linear electrical networks. When solving for S-parameters, the simulator assume s that the structure is excited by Ansys Innovation Space provides comprehensive resources and tutorials on HFSS port basics for efficient design and analysis. emtalk. I know it may If you don't renormalize, HFSS calculates the port impedance based on the width of the line and substrate properties and even the waveport dimensions matter. 6, 0, 0), and then enter the relative coordinates in the dx, dy, dy of the status bar ( 0. I plot the Z11, but I am not sure that is it load impedance (HFSS model Use (ADS) line calculator to get the port impedance for your Transmission line or waveguide, and then compare it to whatever HFSS is given you. To plot the port impedance, Right Click on Results> Create Modal Solution Data Report > Rectangular Plot. My suggestion alluded to setting the port impedance to port impedance hfss when you define a lumped port you define an impedance for each port that represent properation of the other port . c lumped port impedance calculation Is there a straight forward way of extracting what the input impedance of a device (i. Each metal plates are for radiating, but at the balun stage, the one has a purpose for ground the voltage. The planar phased arrays As with any port in HFSS, they are surfaces where incident and absorbed energy is recorded by the simulation, allowing for one to obtain several different electrical properties of the design being simulated. U may have 2 cases: 1) a 1-port model: in this case the input impedance equals the Z11; when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with 50 and put that 6. Asked 8th Jan, 2013 I followed multiple videos and answers on this forum but the line impedance is not matching with the calculated ＲＷＧ　port Hello everybody, I'm looking to find the equation of the impedance of a port in a Rectangular Wave Guide in HFSS. Otherwise you would need to assign another waveport at the other end, PML or radiation boundary won't give you accurate result because the length is so small. Question: The Zo in the matrix data: Zo mode 1 ==> Zcm(common mode) or Zoe(even mode) Note that some softwares, such as ANSYS HFSS, add additional information to the Touchstone standard, such as comments, simulation parameters, Port Impedance or Gamma (wavenumber). e 3. To find external Q I have made everything inside the cavity lossless, and appended a 260 Ohm/sq impedance BC at the termination of the coax port. b4bb4ge Full Member level 2. Thanks Chinmay Here is a tutorial that shows how to import a CAD model of a printed log antenna, setup the model in HFSS and how to use the Smith Chart tool to create a cir when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with 50 and put that value on renom impedance field. • Modify the models’ design parameters. Why HFSS gives different characteristic impedance of the rectangular gives the input impedance into port 1 of the line. Re: 50 ohm termination Hi, zahriladha. This presentation is one in a series of Port Tutorials, intended to help users better understand the nuances of model excitation. Then u can assign them as a differential pair with a reference impedance, say 50 ohm. First, assign the excitation of the rectangular sheet as waveport. By doing Dear all, I have simulated a differential pair lines (GSSG). The Z0 of the wave port is 50 Ohms (refined through tweaking dimensions of the Its lumped port resistance is set at 10 kΩ, and its lumped port capacitance at 2 fF [10]. 48 MB; Cite. Or, how I can prevent it from being used (ignored). 9mm>1. In this video impedance matching of rectangular patch antenna using smith chart is shown. Also, the antenn port impedance, generalised S-parameters and Y-parameters and etc. From the E-field pattern, it is clear that mode 1 is even mode, mode 2 is odd mode. In the project explorer, right-click Excitation-> Assign-> Lumped Port. Assigning a port is an important task for HFSS design and there are three types of HFSS - 50 Ohm Coaxial line terminated with 50 Ohm impedance boundary. If the feed line is a quarter wavelength then it may well be a transformer from the 50 ohm port to the impedance at the edge of the antenna, so is a necessary part of the feed network. You have the option of specifying which impedance will be used in the renormalization calculations. 0625 For E-plan symmetry boundary,, impedance multiplier should be great than 1, i. Under HFSS -> Fields -> Edit Sources I see that the scaling factor has been set to 1 for port1 and 0 for port2. Width and the height of the waveport definitely affect the impedance. 端口的特性阻抗指的是什么? 我的理解是不是正确，高手指点（本人理解：在hfss建模中，为了减少建模量，把接头和相应的同轴线去掉，直接在半波振子的中间加lump port，而在设置lump端口的过程中，full port impedance指的就是省略掉的同轴线的特性 when using hfss i found some problems as follow 1 I am currently simulating a multi-band monopole antenna fed with a microstrip-line. While for active Z-parameters, HFSS will give you the results by taking into account the effect of mutual coupling with other ports. In the second setup, I added two more ports that are very close to each other. Although trivial, this example creates a matched load in 50ohms and then re-normalizes to a 25ohm environment, producing a reflection coefficient of 1/3. Points: 2 Helpful Answer Positive Rating Dec 22, 2011; Oct 29, 2008 #3 B. The impedance bound-ary condition is used to define the serial load as a function of the frequency: Port 1 Port 2. So let’s demonstrate how to I've encountered an issue with HFSS touchstone files and the port impedance. Alternatively, you can derive the expression for Z11 of a two-port In a multi-port devices, when you ask for Z-parameters, e. Lumped RLC Elements in HFSS Version 8 Page 9 Figure 10: Magnitude of S floquet port hfss A guide to Floquet port in HFSS v11. when using hfss i found some problems as follow 1 I am currently simulating a multi-band monopole antenna fed with a microstrip-line. Thus, these S-Parameters are normalized to a frequency dependent impedance in order to obtain minimum reflections over the whole frequency range (similar to HFSS). • Create 2D x-y plots of S-parameter results. But it seems like only one port has a 50 In the lumped port properties, in the “Modes” tab, set the “Integration line” between the coil terminals in the middle of the rectangle. First determine the impedance of a line using a wave guide port then specify the impedance as the impedance of the lump port. The red line is the impedance profile of the 50- Ω transmission line without the plane cutout. 8: signal integrity example, it defines two edge coupled stripline and assign two terminal line in one waveport. ok. The characteristic impedance of the matching layer in this case is 126 ohms, its length would be determined by the angle of incidence and thickness of the matching layer. I have used two ports till now, i. I believe the lumped port will only allow the fundamental mode to exist, whereas the impedance boundary might allow for any mode. I am applying floquet port with master and slave boundary. If I remember right, the ground rules are By comparison, a wave port cannot be placed internally unless there is a PEC backing or electrical conductor behind the wave port. There are two types: Standard Ports: The aperture is solved using a 2D eigensolution which locates all requested propagating modes Characteristic impedance is calculated from the 2D solution 1、同轴线端口的设置 同轴线端口的设置比较常用，一般可以用HFSS中的waveport来设置。Wave ports定义的表面一般为PEC，信号通过它进入和离开结构。它通常用在一些波导结构中，如波导，共面波导，同轴线等。Wave port一般设置在3D结构和边界之间的PEC界面上，让该结构和外部耦合。 If I set my wave port with the size of HFSS provided formula, it's way wider than half wavelength,(roughly 2. zip. Also, when I define a real-valued frequency-dependent impedance as a design 关于HFSS的PORT的理解和用法很多人都会有疑惑，底下我将自己对PORT的理解和大家分享，由于水平有限，文中难免有错误之处，还请大家不吝赐教，热烈欢迎各种板砖，西红柿，臭鸡蛋。。。。{:soso_e113:} 9 \\1 K% A' H3 M- a% `& M4 I" f 先给个概要： 1. . •Boundary Condition –Radiation Surface •FE-BI: Finite Element Boundary Integral I don't know how to set the port impedance to be complex value for simulation of RFID tag antenna? I want to use RFID chip which has the impedance of 12-j140. Hopefully that might work, and save you a lot of time Application Note 530: Optimizing Impedance Discontinuity Caused by Surface Mount Pads for High-Speed Channel Designs Figure 5 shows the TDR impedance plot result comparison from HFSS. 如何在HFSS中建模差分微帶線該視頻向您展示瞭如何在HFSS中創建差分微帶並對其進行建模。 您可以在此處下載該工具包：https I need to figure out a way to do this via impedance checking in HFSS. HFSS will give you the answer as Z0 value in Matrix Data You can find it using eigen-mode solver as well. ANSYS HFSS is used as the base line electromagnetic simulator as it allows the non-linear frequency dependent thin-film properties of a superconductor to be fully implemented. By doing when it comes to match the port impedance on HFSS, I just get the value of port impedance on smith chart, and then multiple that value with hfss input impedance Input impedance is quite simple to be evaluated. 8E17 Ohm), so I def hfss_touchstone_2_network (filename: str)-> Network: """ Creates a :class:`~skrf. They are members of a family of When modeling an electromagnetic structure, the accuracy of the solution solver is dependent on the input signal definition also known as the excitation. The first question is about the port, should I use the wave port or the lumped port? Well, lumped port is You can directly see the impedance in HFSS design. May 19, 2011 #2 K. This course explains these port types briefly and serves as a guide for selecting the appropriate port type for your needs. When the imported network is directly plotted, everything works fine and gives the same results as in HFSS. These data are also imported if detected. Reactions: hattie113. I want to simulte CPW ,and I expect the structure of CPW give the standard impedance 50 Ohm. See Hi,I have an HFSS structure with differential ports. 32GHz FEA model using ANSYS HFSS. For H-plan symmetry boundary, impedance multiplier should be less than 1, i. Thread starter CDWest; Start date Jan 19, 2011; Status Not open for further replies. However, when I run the simulation in HFSS to calculate the reflection phase, I see this warning message: "Port 1 supports an I have been struggling with HFSS for the past few weeks trying to get this to work. touchstone, there is a function called get_gamma_z0() that expects the port impedance matrix to be a single line: However, the port impedance matrix is not always listed as a single line. core. e, Lumped port and Wave port. It is Hi,I have an HFSS structure with differential ports. I'm having a problem with sNp files exported from HFSS having the wrong port impedance. I want to match this differential port impedance with a frequency-dependent complex impedance using the parametric sweeping of various lengths and widths of my structure. Why HFSS gives different characteristic impedance of the rectangular In termianl mode solution, a wave port should be used with two impedance lines drawn from the same reference plane to the lines. lumped port is used for internal feeding for example dipole antenna. • HFSS computes the characteristic impedance of each port in three ways — as Zpi, Zpv, and Zvi impedances. HFSS generates a solution by exciting each wave port individually. It is necessary for designing high frequency and high speed components utilized as a part of advanced electronic devices. The load impedance is air, 377. vfone Advanced Member level 6. In HFSS simulations, the setup of the port Hi I am facing some peculiar problems in HFSS while simulating microstrip and CPW structures (perfectly symmetric structures) between 10 GHz and 50 GHz. An HFSS model of a cylindrical waveguide of uniform circular cross-section along its length excited with a waveport p1 is shown below. This class allows you to create an The proper Wave Port impedance multiplier needs to be applied when using symmetry planes. • Specify solution setup and sweep for the designs. With a variety Dear experts, how to do a 50ohm termination in HFSS. Simulated line impedance should not depend on port impedance! Not sure why you get 66 Ohm. I have a model that I want to know its impedance. If I understand correctly this means that only port1 is fed with 1 W power to calculate the radiation pattern while feeding 0W to port2, which makes sense. However, HFSS simulation accuracy is highly dependent on the geometry of the wave port that is defined in the 3D model. Deembed Settings：是否端口平移，正内负外. microwaves101. You can directly see the impedance in HFSS design. I have read that I needed to use Zpv instead of Zpi in order to find the correct impedance values in HFSS, but although it does change, it Hmm, ok. Thanks in advance. the point you will reach is the normalized input impedance of the antenna. 00 . Variation of impedance with track width Terminal Port Zo Plot 1 80. The HFSS software is designed for extracting modal parameters by simulating passive devices. Now, renormalize the port impedance from 50 -> 25, thus the previous 50ohm load Basic Cavity Resonance Technique for HFSS V6. I selected driven-modal solution for a number of modes of 2. • Validate the design setups. wave port is used for external feeding as given in hfss manual. ). The 10nH inductance value is taken from the component option hfss_inductance (And the component options find their way in the QGeometry tables by rebuilding). I am using Port Renormalization：是否归一化，Renormalize All Modes选择归一化，阻抗一般设置50，即对50欧姆进行阻抗归一化. Figure 3 shows the I am currently running a simulation on a transmission line where i use two lumped ports: Port 1 have an Impedance of 50 Ohm Port 2 an Impedance of 10 kOhm - 132j Ohm I am looking at the coupling between the two ports, in other words: S12 So should I run with both ports renormalized to get the Anyway, after digging for a while, I found out that HFSS treats all surfaces as closed unless you specify otherwise, so for my last simulation, I used an empty air box bounded on the bottom with a radiation boundary, the top with a floquet port, and I left the sides in their original master/slave configuration. 1%. However, the growing Gateway Restaurant and Lounge, located at 5455 Broomes Island Rd, Port Republic, Maryland, is a popular destination for those seeking delicious American (Traditional) cuisine. From the S11 plot i find two resonances at about 8GHz and Impedance Multiplier Field Use if symmetry planes intersect ports. Thus you'll only see the passive Z-parameters. In skrf. Hello guys, I'm trying to calculate port impedance of the antipodal vivaldi antenna(AVA). Then a lump port can be assigned on the signal line infront of the strip. This Wave Port, after Driven Modal simulation, will give me a Zpi impedance. But after I place a boundary box around it, the returned port Zo is no longer true. Thi Actually, I have got one review on my research paper that, I need to show the simulation result upto some range. So, I have difficulty on setting the When you add a second port, obviously Z11 is going to change! You can confirm the ports are both well-matched to the line by observing S11, S12, and S22. Specifically, every port after port1 is labeled as 0ohm. Floquet Ports in HFSS The Floquet port in HFSS is used exclusively with planar-peri 2) Field plots and S-parameter results were analyzed to verify the design met expectations. the port fields of the lump port is quite With the source geometry in place, the user must provide an excitation. 85GHz) converges and gives out some results which are way smaller than what I expect due to closed form equations in When modeling an electromagnetic structure, the accuracy of the solution solver is dependent on the input signal definition also known as the excitation. port impedance hfss when you define a lumped port you define an impedance for each port that represent properation of the other port . For sure, the size of the port will affect its impedance. Z11, HFSS will only enable port 1 and assume all other ports are matched. 17. o A parallel IF substitution insertion loss measuring 本文将详细介绍HFSS中的各种边界条件及其应用场景，包括完美导体（Perfect E）、完美磁导体（Perfect H）、自然边界（Natural）、有限电导率边界（Finite Dear all I found that if you renormalize the port impedance to 50ohm, you would get different S11 results though the port impedance was near 50ohm. 3) Objectives of introducing HFSS software, designing a basic microstrip structure, assigning wave ports, building a radiation box, and analyzing simulation results were achieved. Joined Oct 10, 2001 Messages 5,773 Helped Hi all, i am new to HFSS software and i'm trying to simulate a ten port network. PORT CONFIGURATION AND S-PARAMETERS from publication: Study of the characteristic impedance of gap 如何在HFSS中建模差分微帶線該視頻向您展示瞭如何在HFSS中創建差分微帶並對其進行建模。 您可以在此處下載該工具包：https If you want to have an impedance reference, I suggest renormalizing the port impedance to 50 ohms or any other value you desire. Under Category Choose Port Zo > Under Quantity Choose Zo (p1)> Under But when I plot PortZ0 in HFSS, the values of all the modes are very different from the theoretical values, some go to above 1000 ohm, some go to below 10 ohm. From what i understood when i gives the input impedance into port 1 of the line. Hfss (project = None, design = None, solution_type = None, setup = None, version = None, non_graphical = False, new_desktop = False, close_on_exit = False, student_version = False, machine = '', port = 0, aedt_process_id = None, remove_lock = False) #. 9 answers. 1) General (name the waveport) 2) Modes (don't change anything, left default) Some of these excitations offered by Ansys HFSS are wave port, lumped port, and Floquet port. Fo example, when i simulate a RWG i use two WavePorts non normalised at 50 Ohms, and then, HFSS gives me the impedance Zo (depended of the frequency). If I remember right, the ground rules are So I decided to use the discrete port and after the end of the simulation, I saw the results of using the discrete port (S11 parameter) is quite different compared with using the waveguide port. [SOLVED] Characteristic Impedance (getting Z0) simulation in HFSS using Lumped ports ? Started by rdpdo2002; Jul 25, 2024; Replies: 2; Electromagnetic Design and Simulation. Select the menu item: HFSS > Boundaries > Assign > Impedance 4 A two-step notch is used on the substrate to match the impedance of the air-filled rectangular waveguide to the loaded waveguide, with broad band performance. Can you give me some Does anyone have an idea about the wave port or lumped port in hfss ,which should be used especially for microstrip patch antenna in uwb range i. npk ecwc jijfwl jwgs qccfw vsgozua rpkie esbln zesgs eupo