Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1986-11-26
1989-04-25
Sikes, William L.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343700MS, 343821, 343846, H01Q 928
Patent
active
048252204
ABSTRACT:
A microstrip fed printed dipole with an integral balun is disclosed, fabricated upon a planar dielectric substrate by patterning metallizations disposed on the two surfaces of the substrate. In the arrangement, the ground plane of the unbalanced microstrip transmission line is bifurcated by a central slot to form a balanced transmission line coextensive with the slot which becomes a part of the arms of the dipole and which at the same time serves as the ground plane of a continuation of the microstrip feed. A continuation of the strip conductor of the unbalanced microstrip feed having a "J" shaped configuration continues over the bifurcated ground planes and crosses the slot in proximity to the dipole for effecting an efficient unbalanced feed to the balanced dipole. The arrangement has a double tuned characteristic with two available and independent adjustments facilitating reproducable, optimized broadband performance.
REFERENCES:
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patent: 3623112 (1971-11-01), Rupp
patent: 3845490 (1974-10-01), Manwarren et al.
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patent: 4623894 (1986-11-01), Lee
patent: 4686536 (1987-08-01), Allcock
Edward et al., "A Broadband Printed Dipole With Integrated Balun", Microwave Journal, May 1987, pp. 339-344.
The Compensated Balun/G. Oltman 3/66 vol. MTT-14, No. 3 IEEE Transactions On Microwave Theory and Techniques (pp. 112-119).
Printed Circuit Balun For Use With Spiral Antennas/R. Bawer and J. J. Wolfe May 1960 IRE Transactions on Microwave Theory and Techniques (pp. 319-325).
A New Wide-Band Balun/W. K. Roberts Dec. 1957 Proceedings of the IRE (pp. 1628-1631).
Edward Brian J.
Rees Daniel F.
Baker Carl W.
General Electric Company
Jacob Fred
Lang Richard V.
Le Hoang-anh
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