Communications: radio wave antennas – Antennas – Wave guide type
Patent
1980-11-24
1982-09-14
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343840, H01Q 1302
Patent
active
043498272
ABSTRACT:
A radio frequency antenna having a parabolic reflecting surface and an array of feeds disposed adjacent the focal point of the parabolic reflecting surface, such feeds providing a predetermined amplitude and phase distribution to radio frequency signals passing to such feeds, each one of such feeds passing such energy in the same propagation mode. The energy passing through each one of the feeds is reflected from the reflecting surface and combines at the radiating aperture to provide, in free space, an antenna pattern having relatively low sidelobes over a relatively wide band of frequencies. The array of feeds includes a waveguide section having opposing outer wall portions and a plurality of conductive members disposed between the opposing outer wall portions to provide, with the outer wall portions, a plurality of channels. The conductive members have first ends pivotally connected, at regularly spaced positions, to a pair of orthogonally disposed outer wall portions whereas the spacing between the second ends of the conductive members and the first mentioned pair of outer wall portions establishes the amplitude and phase distribution of the array of feeds. Such channel structure is adapted to provide the desired amplitude and phase distribution and operate with relatively large amounts of power.
REFERENCES:
patent: 2415807 (1947-02-01), Barrow et al.
patent: 2743440 (1956-04-01), Riblet
patent: 3171129 (1965-02-01), Nowakowski et al.
patent: 4012743 (1977-03-01), Maciejewski
Archer Donald H.
Bixler Stephen D.
Thomas David T.
Lieberman Eli
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
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