Flat panel-configured electronically steerable phased array ante

Details Flat panel-configured electronically steerable phased array ante Flat panel-configured electronically steerable phased array ante

1996-11-01

1998-11-10

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Microstrip

343701, 343840, 343786, H01Q 126, H01Q 138

Patent

active

058350624

ABSTRACT:
A flat panel-configured electronically steered phased array antenna includes a planar distribution of densely nested microstrip dipole sub-arrays, arranged and controlled in a manner similar to microstrip `reflect-array` antenna elements. The resultant phase of a circularly polarized wave for a reflect-array fan-out distribution of dipole antenna elements is controlled by an associated plurality of triode-configured field emission devices. Each dipole element sub-array is plated to a resistive sub-layer on an interior surface of a flat first millimeter wave transmissive panel member of an evacuated flat panel type support structure. Mounted to a similar resistive layer on the interior surface of a second, flat panel member is a microstrip conductive layer partially overlapped around its periphery by respective fan-configured microstrip dipole antenna elements plated on the first panel member. Arranged between overlapping regions and overlapping portions of the respective dipole antenna elements are a plurality of elements, that form cathode and control gates of plural triode-configured field emission devices, the anodes of which are dipoles formed on the first plate member. These elements select a desired dipole pair within each subarray and control the current therein.

REFERENCES:
patent: 4914449 (1990-04-01), Fukuzawa et al.
patent: 5043739 (1991-08-01), Logan et al.
patent: 5214394 (1993-05-01), Wong
patent: 5497164 (1996-03-01), Croq

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