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Waveguide Mode Cst

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30 Threads found on edaboard.com: Waveguide Mode Cst
I am starting off with a simple case of lossless dielectric filled waveguide with lossy dielectric segments on it's sides. I did a parameter sweep varying loss and looking at Ez. I am interested in TM11 mode and hence would like Ez to be high. I am using the transient solver to run this. I put in curves at the input and output waveguide (...)
just select the face and set it into waveguide port. you don't need to set the mode just set the harmonic order
Hi Mona7150, You will define the modes number, e.g how many modes are simulated, but what will define the propagating mode (TE, TM or TEM) will be your geometric structure. If your structure is a hollow waveguide, you will not see TEM modes, because the boundary conditions do not allow. Otherwise, if your (...)
Some options: First, increase the number of modes for the waveguide and look at which frequency this mode is propagating. Maybe you can reduce your frequency span. Second, change the dimension of the waveguide! Regards
Hi. I´m doing simulations with a patch antenna, fed by a CB-CPW line... And though I thought i knew CB-CPW well... Some doubts have shown up... Your help will be kindly appreciated. I now there are more modes in this structure but i guess the usual propagating one is the CB-CPW mode, from center strip to lateral and bottom ground planes. I alway
Hi, I suppose that your port is a waveguide port... and then the cst meshing need to have 3 meshcells free (no PEC!) to calculate mode, impedance... that means that you have metal or other PEC in this area of the port. Then check your port excitation, background properties and boundary conditions ! Other solution, if
I tried to design a DRA antenna in cst MWS whose file is attached along with.But I am not getting desired S parameters which may be because of ambiguity in applying ports to the antenna.I am applying a waveguide port at the feed line which is feeding the slot. I am supposed to generate TE mode in that waveguide (...)
I am working on mode converter..i have two issues as follows:- 1.how to give a TM01 mode to a circular bent waveguide in cst microwave studio..? 2.how to check on the output different modes coming out of circular waveguide in cst. The dominant mode of (...)
Yes, waveguide port is OK..... exactly with small mistake.... try study the attachment. If you want, you can send me your project. I will be there on Monday.
I have simulated conductorbacked coplanar waveguide in cst. However I am getting only odd mode fields and not CPW mode ie even mode. Any Suggestions
Looks like I found some answers from searching the previous threads in this forum: and here (Hash answered me in this thread directly, thanks) Basically I just need to define 2 modes (TE
for ur question 1- the embeded port should be to ground ,i.e.,if ur port at z=20 so reference plane should be -20 u run transient solver not frequency solver as u run time not frequency and that method called waveguide method if u use floquet mode(unit cell solver) u should running using frequency solver
Good Afternoon Everyone .. I Would Like To Know What Are The Factors Affecting The Type Of The mode ( TM Or TE ) Traveling Inside A Slab waveguide ?! And Does The Dielectric Constant Er=10.2 Most Probably Gives A Hybrid mode ?! Best Regards .. Thanks Alot !
Question about the frequency domain solver. When I open up the Frequency domain solver parameters windows, where I can specify 'excitation settings' and such, there is a section called excitation where you can specify the excitation port and mode. I had been using floquet modes for a while, and the mode was labeled TM and TE or I can run all (...)
Im doing my final year project about SIW waveguide using cst..i want to find mode TE and TM in cst...plezz reply immidietly..thank you.
Can someone explain what the floquet modes are? In addtion, when I set a waveguide port at a certain boundary I have the option of specifiying a certain amount of modes. What is the difference between these modes a floquet modes?
Hi all friend, One problem put me on edge for a couple days. I am using cst to simulat ethe Coplanar waveguide. The basic on, dielectric material with constant 9.6 and 350um thickness, 70um copper, strip width 350um & gap 250 gap. input frequency 1-5G background material air, big waveguide port according to the instruction, ( i (...)
I am trying to calculate reflection phase for patch reflectarray and i want to compute the reflection phase using floquet ports. I have simulated the reflectarray structure using waveguide simulator approach and already got reflection amplitude and phase. I am trying to use floquet ports to excite similar TE10 mode and compare my results. Any
Hi, You should set a waveguide simulator with two opposite magnetic walls parallel to the electric field and the other two walls as electric walls. Then, put waveguide ports where you want the plane wave to incide. Regards, Iaia
The power will be reflected, transmitted and loss. 1-S11*S11 represent the power except reflection loss. If waveguide does no has loss, S21*S21=1-S11*S11. However, practical waveguide has loss, 1-S11*S11-S21*S21 represent transmission loss
in order to give a matched port and evaluate the mode at the port, cst needs that the waveguide extent inside the calculation domain for three or four mesh cell. You can do two thing, increse mesh cell (not the best) or extend the waveguide section without curves or angle for 0.25lambda.
Hi, I have a problem to set the direction of E-field in waveguides port . I can set the direction of incident wave, but I can not specific the direction of E-field (I simulate in transient mode). Could anyone help me to solve this problem, please? Thank you.
i am interested in finding the bandgap of ebg surface using cst. i am confused how to find the reflection phase diagram or dispersion diagram for the EBG surface. which solver should i use frequency domain . time domain or eigen mode solver? also whether to use waveguide port or plane wave guide excitation? can anyone post the example (...)
If you are using PEC boundaries, the port mode solution probably found a waveguide mode that could possibly propagate (if excited by the problem). You have to pay attention to your boundary conditions, and whether or not your CPW grounds are tied to the PEC wall grounds (if that is your boundary condition). You might want to try a (...)
For cst eigen mode solver, you cannot find the modes of open structures. Also, if you place it very far from the microstrip line, you will start to have some higher order waveguide modes, that is the shield acting as a waveguide cavity. So, I think you should have some feeling where would (...)
Hallo, when using a waveguide port in cst Microwave Studio a 2D Frequncy Domain Solver first tries to get out which mode can propagate down the line. MWS is a TimeDomainSolver, using a gaussian input signal by default, the question is: HOW IS THE GAUSSIAN TIME DEPENDENCY APPLIED TO THE 2D FIELD E(x,y), H(x,y) ? When the (...)
Hello, i still have problems with the size of the waveguide port. I excite a microstrip structure with four different dielectric materials. The line impedance, calculated by the waveguide port, depends strongly on the size. The dispersion (frequency dependency of the line impedance) is totally different, if i use a small or large port. Any
Hello Irfan1, I'm wondering, being that it's a square waveguide, maybe you need to specify a mode polarization angle? I did that, ran it twice, and got the same result twice. Attached is the S-parameter result.
Hello, I am trying to analyze in cst a waveguide assembly which includes a resistive card made of a material which has a resistivity of 150 ohm/square. How do I define the material properties? Any suggestion would be appreciated. Thanks Kato01
I can say nothing about losses in a microstrip. But I have experience with lossy circular waveguide with series overmoded cavities inside simulation at X-band freq. I did calculation with HFSS and MWS both. And the result of MWS was completely WRONG until the last version (5.1sp2) Starting with v5.1sp2 the predicted loss of main mode is (...)