Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-02-18
1977-09-27
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343100PE, 343756, H04B 700
Patent
active
040514749
ABSTRACT:
Interference from polarized signals is minimized by controlling the polarization of antennas having orthogonal dipole radiating elements. The antenna system utilizes microwave hybrids and phase shifters in a coaxial cable feed circuit that divides the power between horizontal and vertical dipole radiating elements. The circuit provides a variable antenna polarization that can be controlled to discriminate against interfering signals having any given polarization characteristics. Coaxial double folded baluns connect feed circuits to the dipole radiating elements and provide proper phasing and impedance transformation for efficient dipole operation.
REFERENCES:
patent: 3176297 (1965-03-01), Forsberg
patent: 3710329 (1973-01-01), Mailloux et al.
The Radio Amateur's Handbook, Amer. Radio Relay League, Newington, Conn., pp. 611 & 612.
Mack Richard B.
Martinez Anthony
Strom John A.
Blum T. M.
Matthews, Jr. Willard R.
Rusz Joseph E.
The United States of America as represented by the Secretary of
Wilbur Maynard R.
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