Multiple dichroic surface cassegrain reflector

Details Multiple dichroic surface cassegrain reflector Multiple dichroic surface cassegrain reflector

1990-10-23

1992-07-14

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Wave guide type

343909, H01Q 1300

Patent

active

051307189

ABSTRACT:
A triplex microwave reflector which includes a primary reflector and a pair of dichroic surfaces disposed between the primary reflector and the focal point of the primary reflector. Each of the dichroic surfaces reflects a specific band of microwave signal frequencies and transmits the others. Microwave signals reflected by one of the dichroic surfaces are focused at a front virtual focal point and microwave signals reflected by the other dichroic surfaces are focussed at a back virtual focal point. Microwave signals transmitted by both the front and back dichroic surfaces are focussed at the primary focal point.

REFERENCES:
patent: 4636797 (1987-01-01), Saffold et al.
patent: 4701765 (1987-10-01), Arduini et al.
patent: 4814785 (1989-03-01), Wu
"A Wide Scan Quasi-Optical Frequency Diplexer" by John J. Fratamico, Jr. et al., IEEE Transactions on Microwave Theory and Techniques, vol. MTT-30 No. 1, Jan. 1982.
"Design of a Dichroic Cassegrain Subreflector" by Vishwani D. Agrawal et al., IEEE Transactions on Antennas and Propagation, vol. AP-27, No. 4, Jul., 1979.

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