Accession Number : ADD014214

Title :   Frequency Independent Constant Beamwidth Directional Lens Antenna for Very Wideband and Multi-Channel Electromagnetic Communications.

Descriptive Note : Patent, Filed 7 Jul 88, patented 11 Jul 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sternberg, Robert L

Report Date : 11 Jul 1989

Pagination or Media Count : 5

Abstract : A frequency independent constant beamwidth lens antenna concept is described utilizing a point source to point focus nonspherical lens. The essential feature is that a twisted planar or hyperbolic paraboloidal phase or wave front is formed by the antenna which then in turn produces a frequency independent constant beamwidth beam in the far field of the antenna for radiation or reception of planar or nearly planar spherical waves. Moreover, the frequency independent constant beamwidth beam may be steered or scanned in azimuth without moving the lens antenna or a plurality of fixed beams in different directions may be formed simultaneously by the lens antenna. Patents. (RRH)

Descriptors :   *LENS ANTENNAS, *PARABOLIC ANTENNAS, *PATENTS, *WAVEFRONTS, FAR FIELD, HYPERBOLAS, PLANAR STRUCTURES, SOURCES, SPHERICAL WAVES, FAR FIELD, HYPERBOLAS, LENS ANTENNAS, PARABOLIC ANTENNAS, PATENTS, PLANAR STRUCTURES, SOURCES, SPHERICAL WAVES, WAVEFRONTS

Subject Categories : Electrical and Electronic Equipment
      Command, Control and Communications Systems
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE