A Low-Noise 80-GHz Silicon IMPATT Oscillator Highly Stabilized with a Transmission Cavity

Design consideration and experimental performance of a new transmission-cavity-controlled Silicon-lMPATT-diode oscillator for millimeter wavelengths are described. The oscillator has the frequency stability of 1 x 10/sup -4/ over a temperature variation of 0-50/spl deg/C and remarkably improved noise characteristics, and is free from troublesome moding problems. Discussion is made of the circuit design that satisfies frequency stabilization, noise reduction, mode stabilization, and circuit-efficiency improvement.