Dean Collins

US Patent:

53941632, Feb 28, 1995

Filed:

Aug 26, 1992

Appl. No.:

7/935323

Inventors:

William E. Bullen - Chino CA
Henry T. Killackey - Covina CA
Dean W. Collins - Claremont CA

Assignee:

Hughes Missile Systems Company - Los Angeles CA

International Classification:

H01Q 1310

US Classification:

343771

Abstract:

The target seeker system includes two radio frequency antennas consisting of two sets of radio frequency selective annular slot patch excited radiator receiver elements, one set for K-band energy, the other for X-band energy, sharing a common ground plane. The radio frequency antennas have a single multi-band image plate consisting of resonant dichroic surfaces which will selectively reflect X- and K-band energy. An image plate is formed with conductive patterns on each side of a low dielectric material. The reflective pattern acts as a quarter wavelength thick plate at the operating frequency. The top of the image plate which has X-band reflectors is spaced at one-half of the desired X-band wavelength above the ground plane and the K-band reflector on the bottom of the image plate is spaced at one-half of the desired K-band wavelength. The thickness of the image plate is adjusted to provide the appropriate relative spacing between the X-band reflecting surface on the top and the K-band reflecting surface on the bottom.