PHASE-LOCKING AND BANDWIDTH IN A GYROTRON OSCILLATOR

For imaging radar and for satelitte and space communication (e.g. NASA 's deep space network), it is important that the bandwidth be as large as possible. Here we derive a formalism for computing the phase locki ng bandwidth that can be achieved in a gyrotron oscillator while varyi ng the beam voltage, As an example, a second harmonic TE02/03 gyrotron is considered. For this device, the effective bandwidth can be increa sed by a factor of about 3 compared with the fixed voltage case by all owing the beam voltage to change together with the input locking signa l.