Patent ID: 7119625
Filing Date: 2006-10-10
Classification: H03B

Abstract:
1. A high frequency oscillator comprising: a transmission line resonator having a midpoint which serves as a null potential point; a pair of active devices for oscillation respectively connected to a pair of resonance wave points for said transmission line resonator, said resonance wave points being in a mutually opposite-phase relationship; and a plurality of output lines each having one end connected to said transmission line resonator at a point symmetric to said midpoint, and the other end commonly connected to a connection, wherein: said pair of active devices share said transmission line resonator as a high frequency resonator to make up a pair of oscillation systems which oscillate in opposite phases to each other at a fundamental frequency depending on length of said transmission line resonator, a standing wave of an even-order harmonic of said fundamental frequency has one of maximum displacement distribution points at said midpoint on said transmission line resonator, said plurality of output lines are coupled to said transmission line resonator respectively at maximum displacement distribution points for a standing wave of an 2n-th harmonic on said transmission line resonator, said standing wave being in opposite phase to that at said midpoint, where n is an integer equal to or larger than two, and even-order harmonic components of 2(n−1)-th or lower are suppressed at said connection.