Coaxially Coupled Ridge Waveguide Tunable Oscillator

Abstract

A coaxially coupled ridged waveguide oscillator circuit using a pulsed IMPATT diode is described. Mechanical tuning bandwidths of 800 MHz (8%) at X-band, instantaneous locking bandwidths greater than 5 percent at 10 dB gain, and a circuit efficiency of 95 to 100 percent have been realized with a silicon pulsed double drift IMPATT diode under large signal conditions.