Broadband microwave oscillator with IMPATT diode - has rectangular waveguide with decoupling point in middle remote from ends

摘要

The broadband microwave oscillator consists of a negative impedance device (e.g. tunnel diode or IMPATT diode) in a resonant circuit comprising a section of rectangular waveguide operated below its cutoff frequency. The coupler (3) that couples energy out of the waveguide (2) is located far enough from the ends of the guide to prevent the fundamental wave being affected by the guide terminations. The negative impedance device (4) with an additional capacitance (5) is located near the coupling out point.