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Phase-locked millimeter-wave two-port second-harmonic Gunn oscillators

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4 Author(s)
Davis, R.G. ; Dept. of Phys., Lancaster Univ., UK ; Leeson, M.J. ; Lennon, H.D.G. ; Lazarus, M.J.

Two-port harmonic oscillators have been developed which are suitable for voltage-controlled-oscillator (VCO) operation in frequency stabilized systems. Two oscillator designs are presented. The first has a fundamental frequency cavity located above the harmonic output cavity and the fundamental is coupled by means of the Gunn device bias-line filter. The second design is an in-line structure which uses a waveguide taper as the filter element separating the fundamental and harmonic frequency components. The latter design is a translation of the first oscillator concept onto a single plane, so that the prospect of an integrated monolithic version is conceivable. The performance of the oscillators is discussed, and a demonstration of their use in a heterodyne phase-locked loop control system is presented

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:39 ,  Issue: 10 )