{TAIL ~ The microwave assembly} may be {HEAD ~ a monopole microwave antenna assembly} but is preferably a dipole assembly 
{ TAIL ~ The microwave assembly } may be { HEAD ~ a monopole microwave antenna assembly } but is preferably a dipole assembly
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH