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52 Threads found on edaboard.com: Hfss Characteristic Impedance
Do you have access to software such as hfss? I know in hfss in particular, you can place a waveport over your TL and it will solve for the modal impedance(s). There are probably several other numerical solvers to achieve the same results.
Which version of CST studio you are using? Use hfss for microwave simulation.
Good evening. I am simulating in hfss a short dipole, as well as a small loop antenna. The purpose is calculating the coupling between two short dipoles or two short loops. To match these antennas I use as excitation a lumped port with the same resistance and opposite reactance than the measured Zin, however, when I use this lumped port whith di
Dear all, as I am having some trouble with my antenna design, I started splitting it up in small problems: My very first problem is about designing a slot line and determining it's characteristic impedance Z_0. My simulation is quite easy: I have defined a slot line on a low dielectric (epsilon_r=3.5) substrate (h=251?m). The slot line w
Hi, I am a newbie to EM simulation / hfss. I used the lumped port (2 port modelling of transmission line ) initially to calculate the S parameters of the transmission line in hfss. Then I realized that I need to use the waveport to find the characteristic impedance. I made slight modifications in the dimensions of the (...)
i have some knoladge on microwave engineering and in hfss and i need to design this coupler to work on 1.67GHz i know i need this geometry but i'm not so sure how to decide the width and length of each and every element in this coupler 108572
Hi, Always use wave ports for microstrip line. And the integration line for microstrip line must be in between the substrate with Zpv as the characteristic impedance. 106841 I hope this is the S-parameter you need, right? If you can send me your e-mail address, I will send you the .hfss file. You say your S21 is
Hi all, Based on the generalized S parameters used in hfss, is it correct that, when simulating a microstrip line for example: 1) The characteristic impedance of the line is found by NOT re-normalizing the port and the characteristic impedance of the line is equal to the wave port (...)
According to the transmission line theory, the characteristic impedance of the device Zo, propagation constant γ only should be related to the materials and the cross-sectional structure theoretically. And hfss solve the 2D fields first, then solve 3D fields. For this, I want to ask three questions: 1 Choose ?solve ports only?, (...)
Hi all, I have been given a task to draw a structure of Coplanar Waveguide with the specification that the center conductor should be of 60microns, the ground planes should be finite and in between two to three times the width of the center Conductor. The substrate could be any silicon or GaAs. I have to adjust the gap width such that in order t
Hi all, Could anyone tell me shall I normalize the waveport impedance to 50 Ohm when simulating a waveguide structure in hfss? And why? Thanks in advance.
Hello!! I wanna know that whether there will be any effect on the results if i change the material from from vacuum to something else in hfss?? Also what is the criteria for checking the results when i simulate a magic tee??
Dear All I am sure this thing has been discussed many times and after reading a number of posts with confusing comments i am writing this for our help. Please correct me if i am wrong any where. Let me first define the port Zo, this variable is related to the characteristics impedance of the port or precisely the characteristic (...)
Hi, I am very new to hfss and not very knowledgeable about Microstrip patch antennas.I want to design a corporate feed microstrip array of 8 elements.I have got the dimensions of the patch but dont know how to find the input impedance of each patch and its connecting transmission line's.Also as I am still struggling with the basics,I want to know
What's the meaning of the Zo in hfss? Is it characteristic impedance? If so, what is wrong with this hfss model? The Zo of the grounded CPWG (Co-Planar Waveguide) is varying a bit obvious with the frequency while the Zo of the microstrip is not. According to the Lincalc tool in ADS, both the impedance (...)
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. The conclusion at that time was that the results given by hfss were not in accordance with the classical electromagnetic bo
Hello, The characteristic impedance is badly implemented in hfss to my opinion: the only way to find the same value of the analytic characteristic impedance of the TE10 mode is to define an integration line and set the impedance calculation to Zpv. Then, you will find the same analytic (...)
I am asking for help. I have made a vivaldi antenna simulation in hfss v12.0.1 But I have troubles with waveport, and because of this very bad VSWR, S11, real and im impedance parameters... How should I change my waveport to get normal parameters? ____________________________________________________________ Model of my Vivaldi anten
Hello, I am implementing Power divider using stripline. I have used lambda/4 = 75mm (1GHz) & air as a dielctric material. My question is that suppose i want to implement 57ohm line so to find out width ill first terminate it at 57ohm then see the reflected impedance if both are same then it is 57ohm characteristic line. Now if i terminate this l
Dear all, I'm puzzled by the result given by hfss (v12 or v13) in a simple rectangular waveguide case. When modelling a rectangular waveguide which cross-section dimensions are 72mm x 34 mm (WR284) and let say a 200mm length, at 3GHz, hfss solution data Z0 are : - using Zpi (default) integration line : Z0=304.7 Ohm - using Zpv integration