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