Patent ID: 7145404
Filing Date: 2006-12-05
Classification: H03B

Abstract:
1. A high frequency oscillator, comprising: a pair of amplifiers for oscillation; a high frequency transmission line for connecting inputs of said pair of amplifiers to each other and connecting outputs of said pair of amplifiers to each other; an electromagnetic coupling member disposed between the inputs and the outputs of said pair of amplifiers for electromagnetically coupling with said high frequency transmission line; a nonlinear circuit for enhancing a level of harmonic components in a synchronization signal which is applied to the nonlinear circuit; a coupler circuit for electromagnetically coupling an output of said nonlinear circuit to said high frequency transmission line; and a filter circuit disposed at the output of said nonlinear circuit, wherein said pair of amplifiers, said high frequency transmission line, and said electromagnetic coupler form two oscillator systems which oscillate in opposite phases to each other with respect to a fundamental wave of oscillation for generating even-order harmonics of the fundamental wave, and said filter circuit filters harmonic components of the synchronization signal such that said two oscillation systems are injected with the same frequency component as the fundamental wave, and wherein said same frequency component as the fundamental wave is injected into said two oscillation systems in opposite phases.