The bandpass modulators are implemented by use of resonators which provide {HEAD ~ a substantially large gain} at {TAIL ~ the arbitrary frequency} 
The bandpass modulators are implemented by use of resonators which provide { HEAD ~ a substantially large gain } at { TAIL ~ the arbitrary frequency }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL