A three wire balun is disposed coaxially of the vertical axis and within the IFF antenna to feed the GPS antenna and {HEAD ~ a conductive shield} is disposed coaxially of the vertical axis surrounding the three wire balun and interconnecting the IFF antenna and {TAIL ~ the GPS antenna} for isolation therebetween 
A three wire balun is disposed coaxially of the vertical axis and within the IFF antenna to feed the GPS antenna and { HEAD ~ a conductive shield } is disposed coaxially of the vertical axis surrounding the three wire balun and interconnecting the IFF antenna and { TAIL ~ the GPS antenna } for isolation therebetween
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH