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