{HEAD ~ a receiver mixer} connected directly to an output of the circulator interface to {TAIL ~ the transmitter} and antenna 
{ HEAD ~ a receiver mixer } connected directly to an output of the circulator interface to { TAIL ~ the transmitter } and antenna
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH