Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-12-05
1977-01-25
Dixon, Harold A.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343840, H01Q 1930
Patent
active
040054330
ABSTRACT:
A small wavelength antenna comprises a paraboloidal reflector with a rim about its periphery and a single feed dipole, backed by a circular cup-shaped cavity. The reflector, dipole and cavity are symmetrically aligned about the antenna axis. The reflector diameter is on the order of 3 to 4.lambda. and the cavity diameter is less than 1.lambda. and more than 1/2.lambda., where .lambda. is any wavelength with the band of operation of the antenna. The cavity depth is on the order of 0.25 of a selected wavelength within the band, at which maximum pattern symmetry is desired, and the dipole is substantially flush with the open end of the cavity. The rim height is on the order of one-half of a selected wavelength within the band of operation of the antenna at which gain is to be optimized.
REFERENCES:
patent: 2407057 (1946-09-01), Carter
patent: 2540518 (1951-02-01), Gluyas
patent: 2556087 (1951-06-01), Iams
patent: 2988741 (1961-06-01), Brown et al.
patent: 3176301 (1965-03-01), Wellons et al.
patent: 3218646 (1965-11-01), Ehremspeck
patent: 3430244 (1952-07-01), Bartlett
Dixon Harold A.
Hughes Aircraft Company
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