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A Frequency Independent Constant Beamwidth Directional Lens Antenna for Very Wideband and Multi-Channel Electromagnetic Communications.
Patent Application, Filed 7 Jul 88,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A frequency independent constant beamwidth lens antenna concept is described utilizing a point source or 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 plurality of fixed beams in different directions may be formed simultaneously by the lens antenna. Patent applications. RH
APPROVED FOR PUBLIC RELEASE