Jim Wilkins wrote:

Avoid them if possible. Semirigid coax and SMA connectors work to at
least 20 GHz.

Are we speaking of the same types of applications? The radar in a Phantom F4J / S used
wave guide both on the transmit and receive side.

Btw, it is not pretty if you lose pressurization at altitude while radiating and don't
forget to change the desiccant / dehydrator.

Wes