Microwave circular polarizer

Details Microwave circular polarizer Microwave circular polarizer

1979-01-19

1980-10-14

Gensler, Paul L.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333135, 333 21A, 333157, 343858, H01P 116, H01P 516

Patent

active

042284104

ABSTRACT:
This specification discloses a microwave circular polarizer for converting a linearly polarized microwave signal to a circularly polarized microwave signal and vice versa. A transducer, such as an Orthomode junction is used to obtain a power split or a power recombination of two orthogonal linear polarizations. To obtain the phase delay required to generate a circularly polarized signal from two linearly polarized signals, the polarizer includes a phase compensator with a pair of waveguides which have appropriate width and length so that signals passing therethrough develop a phase difference therebetween and a composite circularly polarized signal results. The amount of phase shift occurring in each of the waveguides varies with the frequency of the signal in such a way as to produce a high purity circular polarization over a broad frequency band. A phase shift of 90.degree. can be obtained at two frequencies and these frequencies can be selected so that they are within a frequency band having a desirably low axial ratio.

REFERENCES:
patent: 2832054 (1958-04-01), Fox
patent: 3790941 (1974-02-01), Chivers et al.
patent: 3978434 (1976-08-01), Morz et al.
patent: 4047128 (1977-09-01), Morz
patent: 4162463 (1979-07-01), Di Tullio et al.

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