3 ms·

What the process? The tear down says mostly FET based, so I assume a BiCMOS? The AD9361 require front end filtering, as the 5th harmonic of the 2m ham band fa

What the process? The tear down says mostly FET based, so I assume a BiCMOS? The AD9361 require front end filtering, as the 5th harmonic of the 2m ham band falls in a national LTE band; horrible interfence from that wide open front end.

setquk 8y ago
Surely 5th is down enough dB for that not to be an issue?
- madengr 8y ago
  It’s not the 5th being down. The 5th LO harmonic mixes the LTE band down to the 2m band. That’s just inherent in a Gilbert cell mixer. There is a high powered, 20 MHz wide (OFDM) signal pretty much everywhere at 715 MHz.
  - setquk 8y ago
    Ah gotcha. That makes sense.