Flat phase response septum polarizer

Details Flat phase response septum polarizer Flat phase response septum polarizer

1981-03-23

1982-10-26

Gensler, Paul L.

Wave transmission lines and networks

Wave mode converters

333248, H01P 116

Patent

active

043564593

ABSTRACT:
A septum polarizer offering an exceptionally low axial ratio over a wide frequency band. A first trapped mode resonator or resonator pair is inserted in the circularly polarizing waveguide within the same plane as the septum and tuning screws to create a desired resonant response at a frequency lower than the cutoff frequency of the polarizer. Optionally, a second pair of trapped mode resonators is inserted in two opposing waveguide walls that are orthogonal to the septum, to create a desired resonant response at a higher frequency than the upper frequency limit of the polarizer. The resonators serve to flatten the phase response of the polarizer throughout its passband, thereby maximizing the purity of circularly polarized radiation produced thereby.

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patent: 4100514 (1978-07-01), DiTullio et al.
patent: 4126835 (1978-11-01), Gould

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