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# Mode And Waveguide

113 Threads found on edaboard.com: Mode And Waveguide

## HFSS eigenmode solver for open structures

Eigen mode solver is not the right choice to study waveguide modes you want as Eigen mode solver takes every structure as cavity and calculates the resonant modes as this is from where this name Eigen comes from. I think for your purpose simulate your waveguide with (...)

## Waveguide simulation HFSS

Hello. I am trying to simulate a simple waveguide using wave port in both ends. All seems to work, but I get several warnings saying: Discrete solution, process hf3d: Port Port1 supports an additional propagating and/or slowly decaying mode whose attenuation is xxxx and propagation constant is xxxx -- Simulating (...)

## Feeding a rectangular wavegude with two pins

You can probably excite two coaxial modes on the pins (one on each). In HFSS, lumped ports should be OK.

For Filter design Driven mode is good specially if it is waveguide based filter. As in S-matrix solutions will be expressed in terms of the incident and reflected powers of waveguide modes. In case of microstrip based structure you can choose Driven Terminal, as S-matrix solutions of multi-conductor (...)

## How to design non-longitudinal slot antenna (slotted waveguide/siw)?

Hi Terminator3, I guess you are telling slots like "f" and "g" in this figure (waveguide in TE10 mode). Right? 130941 There is a bit of information in "modern Antenna Design, 2nd Edition" by Thomas Milligan (Wiley-IEEE Press, 2005), section 5-24 . (I saw more information in some other book, but now I don't remember

## CST MWS simulation of a rectangular waveguide

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 (...)

## additional modes in waveport propagatin

I'm trying to simulate a waveguide filter that has quite a large BW. I know from the simulating frequency that the second TE mode can propagate. However, when I add a second mode to the waveports I still get the following warning: Discrete solution, process hf3d: Port 2 (or 1) supports an additional propagating and/or (...)

## Specify wavelength inside rectangular waveguide

Each mode in a waveguide has a specific wavelength which is larger than the free space wavelength. Review the derivationtion in your favorite RF engineering text book.

## circular waveguide TE11 and TE21 mode generation

hiii , i have to excite te11 and te21 mode in circular waveguide using coax feed . how to get the length and diameter of coax conductor protruding inside the circular wg. it will be changed in order to meet the waveguide impedence which is much greater than 50 ohm coax line impedence. similarly for te21 (...)

## Cut-off wavelength of dielectric filled waveguide

I guess cut-off frequency of regular wave guide, divided by square root (Er). Also depends on a particular mode.

## How to excite TE21 mode in circular waveguide with HFSS

Hi,guys I am trying to correctly excite the TE21 mode in circular waveguide with HFSS. I set the number of modes as 5. The first two correspond to TE11 mode. and the third one corresponds to TM01 mode. The last two corrspond to TE21 mode. I used two perpendicular (...)

## Optical Waveguide simulation with Lumerical: propagation loss, how is it calculated?

Dear All, I am simulating with Lumerical: mode solutions (2013) a single mode Si waveguide on SiO2; the numerical method used by this simulator is EigenmodeExpansion. The geometry I am using as a reference is similar to a standard 500x220nm, which corresponds to very low simulated losses (it has already (...)

## Simulating a rectangular wave guide using CST Microwave studio

just select the face and set it into waveguide port. you don't need to set the mode just set the harmonic order

## extra circuit board tracing as waveguide, any info?

Sounds like you are talking about coplanar waveguides. In contrast to usual pipe-like waveguides they are transmission lines with a center conductor, operating in TEM (transverse electro magnetic mode). My suggestion is to study the basic stuff about transmission lines and conducted electromagnet

## Excitement of Wave guide by magnetron, TEM, TE, TM mode propagation

Also, be careful of your tone of writing. Condescension isn't appreciated on this forum. As far as I'm aware of, jiripolivka is acting courteously and polite in forum discussions. I guess he stumbled upon you "have been studying through microwave engineering books" and - apparently don't understand the nature of TEM waves. To mak

## Doubt regarding on excitation of TE10,TM10,TE01,TM01 modes in waveguides

May be you reading something into the term "excitation" that it doesn't mean. It simply means that you are feeding a high frequent signal to the waveguide and it propagates therein as an electromagnetic wave of a specific form or "mode". The wave mode is commanded by the field pattern of the transition (...)

## Rectangular Waveguide Bend simulation in HFSS

Hi, In fact, you can define the number of mode you want and after excite (with the edit sources) your bend (on one wave port : eg 1 or 2) with one mode. After simulation, you can plot the S parameters. Ex : S(1:1,2:1 ) who means transfer S parameter from port 1 to port 2 only for mode 1 (ie : TE10) other examples : (...)

## Coupling question in a rectangular waveguide cavity resonator

i want to use coupling loop to be the coupler of a hollow dual mode rectangular waveguide cavity resonator. The question is no matter what the angle between the coupler and the magnetic field in the cavity, The H field direction in one of the mode will be parallel and the other one will be perpendicular to (...)

## CST Error "Some higher propagating mode..."

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

## Dual Mode Coupler Waveguide

Hi everyone, i will need to design a 4-port waveguide coupler for square waveguide and the center frequency in 19GHz. Each kind of dimensions for the 2 square waveguides, holes or other are good. In addition, the waveguide should be parallel in order to connect other downstream levels To start, it (...)