Microwave plate antenna in particular for Doppler radar

Details Microwave plate antenna in particular for Doppler radar Microwave plate antenna in particular for Doppler radar

1988-08-09

1990-02-06

Clawson, Jr., Joseph E.

Communications: radio wave antennas

Antennas

Microstrip

343737, H01Q 138

Patent

active

048991635

ABSTRACT:
The antenna constituted by a plurality of identical parallel and symmetrical linear sub-networks (a7, a6, . . . a1, a'1, a'2, . . . , a'7). The centres of symmetry (b7, b.notident.b, . . . , b1, b'1, b'2 . . . , b'7) of the sub-networks (a7 to a'7) are aligned on a line (c) perpendicular to their diameter and are fed in phase. Each sub-network is constituted by a plurality of radiating elements in even numbers disposed at regular intervals and which radiate from fields displaced from 180.degree. from one radiating element to the following. The pitch of the sub-network is approximately equal to a wave-length guided on the substrate of the printed circuit. Each radiating element is a conducting square surface the side of which is approximately equal to half the guided wavelength with one corner connected galvanically to the feed line. The direction of the surfaces change from one element to the following element.

REFERENCES:
patent: 3363253 (1968-01-01), Ratkevich et al.
patent: 4180817 (1979-12-01), Sanford
patent: 4346774 (1982-08-01), Hirota et al.
patent: 4603332 (1986-07-01), Mead et al.
patent: 4633262 (1986-12-01), Traut
patent: 4730193 (1988-03-01), Schwartz et al.
Daniel et al., "Reseaux d'antennes imprimees dans la bande des 20 GHz/30 " L'Onde Electrique, vol. 65, No. 1, 1985.

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