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Band Pass Ring Filter

Question asked by sam12 on Jul 15, 2014

I am designing a Microstrip ring filter with two ports as a Band pass filter at 2.4GHz. I need to find the exact location on the ring where the input feed must be given so as to have a matched impedance of 50 ohms on both the ends. That is if it should be near the outer diameter edge / inner diameter edge / at the center of the above two.

Changing the dimensions of the Microstrip Tee or the ring itself gives me matched load but I am not sure if this the correct way of shifting the feed. 

Attaching my file here.