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