Julia S Martin

US Patent:

48976644, Jan 30, 1990

Filed:

Jun 3, 1988

Appl. No.:

7/201972

Inventors:

Henry T. Killackey - Covina CA
Julia N. Martin - Marion VA

Assignee:

General Dynamics Corp., Pomona Division - Pomona CA

International Classification:

H01Q 19185

US Classification:

343789

Abstract:

The described embodiments of the present invention provide a high-gain antenna while allowing for the inclusion of devices within the antenna array. In one embodiment of the invention an array of receiver/transmitter elements is positioned in a pan-like reflector base. The elements are positioned one-quarter of a wavelength from the surface of the base. The wavelength is the wavelength of the chosen frequency of transmission or reception of the antenna. A partially reflective plate is positioned one-half wavelength from the base and thus one quarter wavelength from the elements. Reflective disks are also positioned one-half wavelength above the base and are positioned directly above the elements. The disks create a resonant cavity around the elements for waves of the chosen frequency arriving from near normal to the plane of the base or being emanated from the elements at a normal or near-normal angle. The partially reflective plate extends this resonant area spatially from the element.