Double-loop frequency selective surfaces for multi frequency div

Details Double-loop frequency selective surfaces for multi frequency div Double-loop frequency selective surfaces for multi frequency div

1993-09-23

1994-12-13

Hajec, Donald

Communications: radio wave antennas

Antennas

Wave guide type

343781CA, 343909, H01Q 1914

Patent

active

053733029

ABSTRACT:
A multireflector antenna utilizes a frequency-selective surface (FSS) in a subreflector to allow signals in two different RF bands to be selectively reflected back into a main reflector and to allow signals in other RF bands to be transmitted through it to the main reflector for primary focus transmission. A first approach requires only one FSS at the subreflector which may be an array of double-square-loop conductive elements. A second approach uses two FSS's at the subreflector which may be an array of either double-square-loop (DSL) or double-ring (DR). In the case of DR elements, they may be advantageously arranged in a triangular array instead of the rectangular array for the DSL elements.

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