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AD8302 reflectometer setup

Question asked by sonnekhoa on Feb 14, 2016
Latest reply on Feb 17, 2016 by jdobler

Hello,

I have setup a reflectometer using AD8302 like in the datasheet. But instead of using 2 couplers, I only use 1  directional couplers with coupling 20dB and directivity 30dB. So that I can get the incident wave and reflected wave at forward and backward branch.

 

Is it okay with my setup like that?

 

Also in datasheet I have read that voltage at Vmag and Vphs will proportional to Gain and Phase in dB. That means they are DC voltage at these output pins?

 

The voltage at these output pins should be 900mV without applying any signal to INPA and INPB. Is it correct?

 

Regards

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