Patent ID: 7145405

Claim:
A planar harmonic 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; a slot line disposed between the inputs and the outputs of said pair of amplifiers for electromagnetic coupling with said high frequency transmission line, said high frequency transmission line traversing said slot line at two positions between the inputs of said pair of amplifiers and between the outputs of said pair of amplifiers; an output line connected to said high frequency transmission line at one of said two positions; and an electronic device for connecting conductors on both sides of said slot line, and for controlling an electromagnetic wave field of said slot line in accordance with a control signal applied thereto, wherein said electronic device is arranged between said two positions, and wherein said pair of amplifiers, said high frequency transmission line, and said slot line form two oscillation systems which oscillate in opposite phases to each other with respect to a fundamental wave of oscillation, for generating an even-order harmonic of said fundamental wave.