Radial constrained lens

Details Radial constrained lens Radial constrained lens

2007-10-16

2007-10-16

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

C343S705000, C343S753000, C343S785000, C343S850000

Reexamination Certificate

active

11325321

ABSTRACT:
The invention provides apparatuses for a radial constrained lens in a steerable directional antenna system. The radial constrained lens includes a feed array that excites a continuous radiating aperture through a section of radial waveguide. Feed elements of the feed array are coupled to a feed network that processes a signal for each of the active feed elements. A feed array may include a plurality of feed probes or a plurality of waveguide sections. A sector, which includes a contiguous subset of feed elements, may be configured by a switching arrangement either in a transmit mode or a receive mode. The radial constrained lens may be commutated about a full 360 degree aperture view. Also, a plurality of radial constrained lens may be vertically stacked so that a scanned beam may be adjusted both in an azimuth and elevation directions.

REFERENCES:
patent: 3022506 (1962-02-01), Goebels, Jr. et al.
patent: 4507662 (1985-03-01), Rothenberg et al.
patent: 4931808 (1990-06-01), Lalezari et al.

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