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