I used ADF4113HV and HMC738/HMC739 to form an RF sensor.
A very large RFout/2 signal can be detected from RFout port.
Although I used 50 ohm impedance to absorb RFout/2 output.
Some details are shown in the photos.
The substrate is FR-4, and the ground is complete.
The relative power of RFout to RFout/2 is around 17 dB.
The thru-holes were added densely.
Is it possible to use a filter to exclude RFout/2 signal? Or the chip malfunctions itself?
P.S. I hope a enable pin could be adopted to shutdown the unused port.