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hello,
I have to design a patch antenna with 25% bandwidth. I would like to use stacked patches (possibly two) with coax feed, can anyone suggest some design rules or design formulas to start with, instead of leaving everything to the optimiser of any EM software. Any reference to papers, books...
The two patents US4958166 and US5612702 show a way to obtain sum and difference beam with slotted waveguide. (if you have problems to get the full-text of the patents go to IP.com - Intellectual Property Library | Search Patent Database | Non-Patent Literature).
greetings
Hi all,
I'm studying periodic loaded waveguides from "Foundation for microwave engineering" (Collin) and I've obtained a Brillouin diagram (or ω-β diagram). Since for each value of k*d on the vertical axis (associated to one frequency value) are associated multiple values of β*d on the...
Hello,
I need some help to set up a CST simulation to calculate the IFR (Induced Field Ratio) of a cylinder. I draw the cylinder and illuminate it with a plane wave, but I don't know how to get the E-field at a certain distance away from the cylinder.
Any help appreciated.
thanks
Hi all,
I need some help to design a squintless slotted waveguide antenna with a very narrow beam and with an operative band of about 4%. Any suggestion or references are appreciated. I think it should be center-fed in order to be squintless, but the main beam gets spoiled when frequency changes...
cascade connection two port s parameter
Hello,
I need to find all the methods to compute the S parameter of the cascade connection (or other types of connections) of N-port networks described by their S parameters. I exclude the use of chain (T or ABCD) parameters since they work only when the...
Re: NEAR-FILED TO FAR-FIELD!
Try with this paper: "Accurate determination of planar near-field correction parameters for linearly polarized probes" Repjar, A.G.; Newell, A.C.; Francis, M.H., IEEE Trans. Ant. and Propag, June 1988.
Anyway if your antenna is linearly polarized, just do the...
Hi all,
my first time on this forum.
I'm trying to find the scattering parameters of two test fixtures using TRL, but I cannot get the complete scattering matrix. My test fixtures are essentially coaxial to waveguide transitions.
Following exactly TRL procedure I don't get the correct value of...
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