GUNN OSCILLATOR INJECTION LOCKING CIRCUIT AT MILLIMETER-WAVE FREQUENCIES

Millimeter wave frequencies are proposed as carriers of microcell futu re mobile systems. High frequencies in the reg ion of 60-62 Ghz are su ggested. A serious difficulty in this context is the lack of sufficien t pain in active devices. Both on receiver and transmitter units this difficulty is faced. Mixing, amplification, carrier recovery and modul ation / demodulation subsytems are required to be operational at these higher frequencies Presently the MMIC's show also limited performance . In this report an alternative approach active processing technique i s examined based on an injection locking in Gunn oscillator A non-line ar analysis is applied to determine the fundamental properties of inje ction locking in Gunn oscillator performance under the influence of an external signal. Details of waveguide action is taken into account by solving the corresponding boundary condition problem. Finally experim ental results are presented for a 30 GHz oscillator.