The microwave antenna has {HEAD ~ a radiating portion} connected by {TAIL ~ a feedline} to a power generating source, e.g., a generator 
connected by
The microwave antenna has { HEAD ~ a radiating portion } connected by { TAIL ~ a feedline } to a power generating source , e.g. , a generator
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH