Patent ID: 6552620
Filing Date: 2003-04-22
Classification: H03B,H03F

Abstract:
A high power solid state power RF oscillator, comprising:a power FET having a gate, a drain, and a source, wherein the source is RF grounded and suitable voltages are respectively applied to the drain and gate to place the transistor in a conducting condition; a drain circuit connected to the drain of the power FET; and a feedback circuit connected between the drain circuit and the gate, wherein the feedback circuit is adapted to provide suitable positive feedback to initiate and sustain an oscillating condition with a fundamental frequency being greater than 300 MHz and with an RF power output in excess of 50 watts; characterized in that the drain circuit comprises transmission lines having widths which provide a conjugate match for the drain at a fundamental frequency and lengths which provide a high impedance for odd harmonics of the fundamental frequency.