Steven P Bradshaw

US Patent:

20130176186, Jul 11, 2013

Filed:

Jan 11, 2012

Appl. No.:

13/348015

Inventors:

Robert G. Yaccarino - Torrance CA, US
James A. Carr - Fountain Valley CA, US
Rohn Sauer - Los Angeles CA, US
Thomas C. Da Veiga - Lakewood CA, US
Steven E. Bradshaw - West Hills CA, US
Lonny Richard Walker - Torrance CA, US

International Classification:

H01Q 1/00
H01Q 1/50

US Classification:

343787

Abstract:

The present invention relates to active electronically scanned array antennas. A thin, low cost design is provided by coupling electromagnetic energy into periodically driven long slots () using circulators with integrated probes (). The long slots () are formed as grooves () in a conductive base plate (), each groove () bracketed on both sides by conductive strips (). The circulators with integrated probes () are installed between the conductive strips () and the base plate (), to reduce fabrication costs of the machined parts and to facilitate the making of connections between the circulators and the antenna electronics. The probes () protrude partway into the slots () and provide coupling to waves propagating in free space.

US Patent:

50309650, Jul 9, 1991

Filed:

Nov 15, 1989

Appl. No.:

7/437410

Inventors:

Pyong K. Park - Agoura Hills CA
Steven E. Bradshaw - West Hills CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H01Q 1310
H01Q 2124

US Classification:

343770

Abstract:

An antenna incorporating a slot and a plurality of ear-like dipole elements. The antenna comprises a ground plane having a slot disposed therein, and a plurality of ear-like elements attached to one side of the ground plane along the elongated edges of the slot. The ear-like elements are oriented orthogonal to the ground plane in the same direction. Typically, the plurality of ear-like elements are disposed in a symmetrically opposed relationship along the elongated edges of the slot. The plurality of ear-like elements typically comprise two generally quadrant-shaped elements having the centers of the respective quadrant-shaped elements are disposed at or near the outer edges of the slot and the outer edge of the elements extend to about the middle of the slot. The ear-like elements may be rotated with respect to the slot in order to fine tune the polarisation direction. In a typical antenna, a plurality of slots are employed, and the present invention permits the use of randomly oriented or regularly spaced slots that are fed by means of conventional rectangular waveguides or boxed stripline.