The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1984
Filed:
Aug. 30, 1982
Normand Barbano, Sunnyvale, CA (US);
GTE Products Corporation, Stamford, CT (US);
Abstract
A bi-loop antenna system comprises an array of four bi-loop antennas equally spaced from the array axis and fed in phase and with equal power. Each antenna comprises an electrical conductor configured as two substantially identical open-ended coplanar loops, preferably square in shape, having colinear axes parallel to the array axis and electrically connected together, the open ends defining two closely spaced feed points at the middle of the array. The array is fed by a four-way coaxial power divider with output ports connected to the antennas, respectively, remote from the feed points thereof by coaxial lines of equal length. A balun comprising a portion of one of the loops of each antenna and a closely spaced coextensive conductive strip connects the inner and outer conductors of the coaxial cable to the two feed points, respectively, of the antenna. In a preferred embodiment, the conductors of each antenna are formed on a dielectric sheet or board by printed circuit techniques. This antenna system produces a horizontally polarized omnidirectional radiation pattern over an octave bandwidth and has a VSWR response of the input impedance with a value less than 2:1 over the octave bandwidth.