Beam type planar array antenna system

Details Beam type planar array antenna system Beam type planar array antenna system

1975-02-07

1976-10-19

Lieberman, Eli

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343771, 343853, H01Q 308, H01Q 1318

Patent

active

039874516

ABSTRACT:
An improved planar (flat plate) array antenna system and method of fabrication is disclosed. A planar array antenna or array is mounted in a support for stabilization against roll and pitch movements with a rotary joint providing uninterrupted radar operation. The array is scanned in azimuth up to 120 rpm with elevation or tilt control. The support arrangement is a four gimbal arrangement providing for a high r-f gain to swept volume ratio for a forward looking radar with fast azimuth scan. The array comprises a front plate and a back plate attached to spaced flanged beams and end shorts for forming a plurality of RF energy cavities. The front plate has radiation output ports (shunt slots) covered with a Kapton layer for closing the array cavities against moisture and to permit pressurization to prevent arcing. The back plate has power divider slots (series slots) over which a manifold is disposed for distributing RF energy into the array. The flanges of the flanged beams provide the increased bonding area necessary to retain the front and back plates during cavity pressurization.

REFERENCES:
patent: 2700106 (1955-01-01), Taylor
patent: 3044066 (1962-07-01), Butler

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