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i cut the stub away , and now the magnitude of S11 and S22 is almost the same as provided by the manufacturer.
okay now i want to ask: if u have an IC of a partially matched amplifier and u want to match it at a particular freq, can u do this or not ??
once i designed a LNA , there is...
I designed the CPWG layout with matching network at the input and then simulated in ADS using co simulation feature. then after fabrication process, i used VNA to to get Practical S params. there is as such no issue in fabrication or soldering the IC. it is taking nominal current 650 mA @5V. But...
Avago ammp6408 is a broad band MMIC amplifier (6-18 GHz) and its RL is merely 3 dB.I need to use it in a narrow band application (9.4-9.6 GHz). i designed a single stub matching network from the given S parameters to improve its RL in the desired band. The things are working in Momentum...
Please suggest some good software for signal integrity check.
Is CST Microwave studio is good enough for this purpose or i need some kind of special software ??
Thanks
ya i agree, for some 50 % BW i can not make strong enough cross coupling but for low BW (say 20 %) it is quite possible to achieve such couplings. Thicker board (50 mil or higher) would made the job easy and low dielectric if size is not a constraint.
But the thing is when i design CQ filters...
further detail :
i had been designing cross coupled filters for narrow BW using this technique (up to 10%). now i need a miniaturized filter design so i will go for Aperture coupled open loop resonators (double sided, back to back) bt i need BW of 16%. i know it prior that...
Re: coupling k between 2 1/4λ microstrip resonators
"Microstrip filters for RF and Microwave Applications" by jia sheng hong (chapter eight)
here u will get all the required info.
when u compute coupling coefficents from em simulation the formula Kij =±(f²b-f²a)/(f²b+f²a) is only valid for narrow BW as derived from lumped element approximation. How to compute Coupling coefficents for wider BW ??
Thanks
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