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How to combine RF differential signals (broadband) into single output connector?

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Hi everyone,

I'm a beginner on RF circuit design, and currently I am working with a broadband circuit (~40G)

The output of the chip (TIA) is differential, but the measurement equipment only comes with single RF input port, therefore I am looking if there is any method to combine them into single-ended output signal?

I checked the rat-trace coupler, but I found there will be approximately 6dB of attenuation at the difference port. Is it possible to implement it on MHMIC?


THANKS A LOT!!!
Mario Young
 

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