Superconductive polarization control network

Details Superconductive polarization control network Superconductive polarization control network

1991-02-25

1992-07-07

Gregory, Bernarr E.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including polarized signal communication transmitter or...

333995, H01Q 2106, H01Q 2124

Patent

active

H00010790

ABSTRACT:
Polarization Control Networks (PCNs) are used in active solid-state array transmitters. Polarization ECM requires precise polarization control of the transmitted signal. Prior polarization control networks (vector modulators) use ferrite phase shifters to achieve low loss and wide bandwidth, but because of their large size they must be placed before the RF power distribution network of the array. By implementing the polarization control networks in MMIC technology for each antenna element, and integrating each PCN with a 2-3 watt amplifier at its input, it is possible to eliminate half the required feed network and active amplifiers from the system. Each polarization control network unit includes a plurality of thin film superconducting phase shifters, hybrids and transmission lines enclosed in a cryogenic package. If more power is required than the superconductive PCN can accommodate, the amplifiers can be placed after the PCNs, and still maintain size and performance advantages over current implementations.

REFERENCES:
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patent: 4806888 (1989-02-01), Salvage et al.
Ryan, High-Temperature Superconductivity for EW and Microwave Systems, Journal of Electronic Defense, May 1990, pp. 55-59.

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