A high frequency semiconductor device contains a semiconductor element in {HEAD ~ a cavity} formed by a dielectric board and {TAIL ~ a cap} 
formed by
A high frequency semiconductor device contains a semiconductor element in { HEAD ~ a cavity } formed by a dielectric board and { TAIL ~ a cap }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL