On 02/13/2018 03:30 AM, Dominik Eyerly via USRP-users wrote:


I've noticed that the isolation between the Tx/Rx and the Rx2 port is quite poor at the upper frequencies ~22dB at 5.9GHz. Could you explain if this is to be expected? Would it be possible to know which switch you are using? Any way to improve the isolation?



The schematics for B20xmini are here:


How are you measuring isolation?  Are both ports terminated in 50ohms?

You could remove C23, which would improve isolation a bit further, but you'd be stuck with only EVER using RX2 for receive, and this would of course
  void your warranty.

i.A. Dominik Eyerly
Head of RF Software

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