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# Circular Transition

12 Threads found on edaboard.com: Circular Transition

## Free software to simulate circular waveguide

Hello, Do you know of a free program that can simulate a circular waveguide? I need it to analyze the field distribution in the waveguide and hopefully to design a coax to circular waveguide transition. I'm not very interested in demos, because those are hard to get and limited to 30 days or less. I would prefer a free software,even if (...)

## Rectangular to circular waveguide converter loaded with dielectric material

Hi Diameter of circular waveguide for 2.45 GHz would be 93.3mm(kindly refer Microwave Engineering by D. M. Pozar) Initially the transition length can be choosen such that, length is greater than twice the guided wavelength. Then transition length can be optimized to get better return VSWR.

## Mode matching technique for step transition in Rectangular to Circular Waveguide?

I've been designing step transitions for Rectangular to circular waveguide, and I'm trying to search for any concepts regarding how to determine the optimal dimensions of the intermediate steps for this transition. From what I learned each step length should be kept at least to 1/4 of the guide wavelength, but for the height and width, I (...)

## How to properly define Circular TE11 waveguide mode in CST and HFSS?

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 (...)

## Thru the floor transition dimensions?

Anybody have the dimensions of the microstrip "lollipop" pattern to get me from the top of a housing, through the housing middle floor, to the bottom of a housing through a coaxial feed thru? Ku band frequency. I need the diameter of the circular part, and the width and length of the handle.

## square to round waveguide transition

Hi, Maybe it helps: Online calculators help design sheet-metal transitions and cones K.

## Circular to Rectangular Transition in HFSS .(Help required)

Hi friends, I am designing an orthomode transducer for which I need to make transition from circular to rectangular port. I want to do it in step transitions. So if anybody can help me, in providing a document to design such a transition, for maximum matched ports. Best regards.

## Transition: coax/circular waveguide

Hi, do you know something about circular waveguide to coax transition design, please? Thank

## circular-to-rectangular waveguide transition

Hi, do you know, what the best design for circular-to-rectangular waveguide transition? - circular diameter: 18 mm, rectangular: R120 - 19.05x9.525 - 10.7 - 11.7 GHz. I can do transition with S11 < -20 dB, but I need about -30 dB Can you help me ? Thank

## S parameter - Is it so hard ?

Hi, I need help. A have transition from rectangular to circular waveguide. So return loss = X dB. Can you tell me, how is design S matrix ? X in dB is 20log10(S11), so S11 = 10^(X/20) and S matrix is is it true ? Thank

## Waveguide to coax transition

Hi to all, I have to design a circular waveguide to coaxial transition in ku band (10.95GHz-14,5GHz). I am simulating with CST. Please, can anyone help me? Thank you so much in advance. Regards.

## Dielectric in circular waveguide

well, usually when We speech about wavelength (λ) We mean wavelength of a radiation flowing inside it's proper media. So we speech about λg inside a dielectric. But since λ/4 steps gives often a large enough bandwidth, if You make a mistake and confuse λ and λg and the εr is small enough, the error should be not exc