MICROWAVE HARMONIC FILTER EMPLOYING CASCADED ALTERNATE E-PLANE AND H-PLANE T-JUNCTIONS

摘要

A plurality of cascaded alternate E-plane and H-plane T-junctions pass the fundamental of a microwave signal fed thereto while substantially attenuating harmonics of the fundamental. Each of the junctions includes an input arm responsive to the wave, an output arm at right angles to the input arm and a further arm aligned with the input arm. The further arm includes parallel waveguides for preventing substantial propagation of the fundamental while providing propagation of the harmonics. At the end of each of the parallel waveguides a microwave absorber is provided to substantially attenuate the harmonics.