Balanced dipole antenna

Details Balanced dipole antenna Balanced dipole antenna

2007-03-20

2007-03-20

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C343S793000, C343S820000

Reexamination Certificate

active

10984699

ABSTRACT:
A balanced dipole antenna has a coaxial cable connected between a load or source and the left and right dipole arms to substantially eliminate common mode current and radiative coupling between the coaxial cable and the left and right dipole arms. The connection between the source/load coaxial cable and the left and right dipole arms is a symmetric balun having a center branch that is an extension of the source/load coaxial cable, and left and right stubs. When the stubs are segments of coaxial cable, the outer conductors of the left and right stubs of the symmetric balun are respectively coupled to the left and right dipole arms, and one of the inner conductors of the left and right stubs is connected to the inner conductor of the center branch, while the other of the inner conductor of the left and right stubs is connected to the outer conductor of the center branch. When the stubs are metallic, the inner conductor of the center branch is electrically connected to one of the left and right dipole arms, while the outer conductor of the center branch is electrically connected to the other of the left and right dipole arms. A sliding bar at the base of the stubs electrically connects the outer conductors of the left and right stubs and the center branch.

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Brouwer, “On continuous vector distributions on surfaces”, pp. 273-282, Mar. 27, 1909.
Hansel, “Polarization of Errors of Radio Direction Finders, A Proposed Classification”,Proc. IRE, p. 970, Aug. 195?.
Mathis, “On Isotropic Antennas”,Proc. IRE, p. 1810(?), Dec. 195?.
Roberts, “A New Wide-Band Balun”,Proc. IRE, pp. 1628-1631, Dec. 1957.

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