Shifted focus cassegrain antenna with low gain feed

Details Shifted focus cassegrain antenna with low gain feed Shifted focus cassegrain antenna with low gain feed

H - Electricity

01

Q

351/53

H01Q 19/19 (2006.01) H01Q 15/16 (2006.01)

Patent

CA 1191944

ABSTRACT OF THE DISCLOSURE A new type Cassegrain antenna provides a shifted or ring focus by use of a subreflector having a reflecting surface in the shape of an ellipsoid of revolution or a shape similar to two foci arrangements in combination with a low gain radiating element having a phase center which is relatively-insensitive to frequency. The result is an extremely-compact, axially-symmetrical Cassegrain antenna construction for less than sixty wavelength antenna diameters, maintaining approximately a 10 per cent subreflecter to main reflector diameter ratio.

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