Communications: radio wave antennas – Antennas – Wave guide type
Patent
1996-08-14
1998-10-06
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Wave guide type
343785, 343772, 333126, H01Q 1300
Patent
active
058183965
ABSTRACT:
A feed system for an antenna has a set of inner and outer coaxial waveguides which apply, respectively, both higher and lower frequency radiations to a common radiating aperture provided by a horn and shroud which envelops radiating apertures of the individual feed waveguides. Each of the feed waveguides carries signals having a bandwidth of an octave. Lower frequency radiation to be transmitted by the outer coaxial feed waveguide is applied thereto by a set of four waveguides of a launcher which launches a wave with a desired propagation mode into the outer feed waveguide. Each of the launch waveguides is initially a rectangular double-ridged waveguide for increase bandwidth. The ridging is reduced to a condition of no ridging in the outer feed waveguide by a transition to a single inner ridge which terminates in a tapered star-shaped combination ridge within the outer feed waveguide. Impedance matching rings are slidable within the space between the inner and outer surfaces of the coaxial waveguide for development of a desired standing wave ratio for accurate generation of a desired beam pattern. A dielectric rod is disposed in a forward end of the tube of the inner feed waveguide and protrudes therefrom into the horn for shaping a beam of the higher frequency radiation. A single common phase center is provided for all bands with radiation simultaneously at plural bands.
REFERENCES:
patent: 3216017 (1965-11-01), Moore
patent: 3268902 (1966-08-01), Turrin
patent: 3605101 (1971-09-01), Kolettis et al.
patent: 4994818 (1991-02-01), Keilmann
patent: 5005023 (1991-04-01), Harris
patent: 5017937 (1991-05-01), Newham et al.
patent: 5109232 (1992-04-01), Monte
patent: 5122810 (1992-06-01), Nisbet et al.
patent: 5248987 (1993-09-01), Lee
patent: 5550553 (1996-08-01), Yamaki et al.
patent: 5583469 (1996-12-01), Weinstein et al.
patent: 5635944 (1997-06-01), Weinstein et al.
Anderson Bryant Ford
Deneris Charles Andrew
Gartside Paul Johann
Harrison Douglas Melville
Teuscher Kevin L.
Hajec Donald T.
Ho Tan
L-3 Communications Corporation
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