Changing {HEAD ~ the magnetization} of the magnetic member 3 for {TAIL ~ frequency regulation} can reversibly perform a regulation of the frequency characteristics of the nonreciprocal circuit 
for
Changing { HEAD ~ the magnetization } of the magnetic member 3 for { TAIL ~ frequency regulation } can reversibly perform a regulation of the frequency characteristics of the nonreciprocal circuit
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH