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30 Threads found on Cst Waveguide Mode
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 (...)
I am implementing a simple rectangular wave guide on cst Microwave studio to operate on the X-band . Does anyone have idea which type of port I have to use as I am using wave guide port and it doesn't work ? and how can I choose the mode? Thanks in advance
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 (...)
Hi dear but I do not know : how I can increase the number of modes for the waveguide port in cst ? When I run the project in transient solver ,I choose all modes for solving ! 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:- to give a TM01 mode to a circular bent waveguide in cst microwave studio..? to check on the output different modes coming out of circular waveguide in cst. The dominant mode of (...)
actually i have no idea about waveguide mode. i am a beginner user for cst simulation. do u mean that i just simply need to right click at port part and increase the number of mode to 2? "the exist hybrid modes at inhomogenous port 1. this could lead to an inaccurate energy balance. please check your (...)
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
I'm designing a rectangular to circular taper transition in HFSS and cst, but doesn't seem to get it right. How should I define the TE10 for rectangular and the TE11 for circular (they say this is degenerate but i dont undestand what that means) in cst? or HFSS? Can someone explain this to me, and how to do this properly? Thanks! I already (...)
Thanks abdoeng, the following are the boundary conditions i am using in cst and also the waveguide port configuration. 5800958010 Are they right? The results are also attached. I want phase-size curve, but i dont know how to get this in cst. The W is the width of rect patch.
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 (...)
floquet mode using cst be more easy than HFSS you just choose unit cell boundry condition,and use your floquet mode it so easy,i already try it regards
Hi everyone, I have a problem. I am simulating a FSS cell in cst Studio and I want to calculate the reflection coefficient in a frequency range with a plane wave (TEM mode). I am using a waveguide, but I am not sure which mode I am exciting with a waveguide. Any of you can you tell me how to excite a TEM (...)
Hi everybody i am analyzing Cylindrical waveguide using cst Microwave studio. I want to calculate Total Power transmitted and Power loss for a cylindrical waveguide using cst but I am not understanding hw can i calculate it? Plz help me. Thanks
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 (...)
Hellow Whenever i design CPW port in cst, it comes up in error message "Some higher order propagating modes at port 1 are not considered in time domain calculation. This probablay leads to inaccurate energy balance. Consider reduce the port size or upper frequency limit" What does this error message and how to solve it. Does it has any effect o
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 (...)
@itzikhaim What do you mean with "the maximum modes of (TE/TM)" ? @elomatic Using the "FullPlane" option brings problems with higher order modes. --- When using waveguide ports, a 2D eigenmode solver tries to find out the possible modes. If the port face is too large, there will be higher (...)
I think there is a serious bug in cst 2006. Here is the problem. I have a simple project: just two waveguides facing each other. I ran the simulation 4 times with the same exact settings. To my suprise, the results of these 4 runs were quite different than each other. I have the latest service pack installed and I am using a licensed version (I mea
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
From ur theoretical calculation, 1meter transmission line is 5.65dB/m, then 20mm length loss should be 5.65-log(50)= 3.95. In cst simulation, did u take the metal loss (skin effect) into consideration? Regards,