Helix antenna

Communications: radio wave antennas – Antennas – Spiral or helical type

Reexamination Certificate

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Reexamination Certificate

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10517499

ABSTRACT:
An antenna element is disclosed, having a ground plane (106), a helix (104) disposed above the ground plane (106), the helix (104) being connectable to a communications apparatus at a helix end (214) located near the ground plane (106), and a spiral (102) substantially centred on the axis (100) of the helix (104) the spiral (102) having an outer end thereof connected to the other helix end, said spiral (102) thereby terminating the antenna.

REFERENCES:
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patent: 4429314 (1984-01-01), Albright
patent: 5041842 (1991-08-01), Blaese
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patent: 5479182 (1995-12-01), Sydor
patent: 5754146 (1998-05-01), Knowles et al.
patent: 6112102 (2000-08-01), Zhinong
patent: 6115005 (2000-09-01), Goldstein et al.
patent: 6133891 (2000-10-01), Josypenko
patent: 0 528 775 (1993-02-01), None
patent: 1 507 836 (1978-04-01), None
Patent Abstracts of Japan of JP 08-078946 dated Mar. 22, 1996.
Patent Abstracts of Japan of JP 2001-094333 dated Apr. 6, 2001.
Patent Abstracts of Japan of JP 05-251919 dated Sep. 28, 1993.
Nakano, H., et al. “Extremely Low-Profile Helix Radiating a Circularly Polarized Wave”IEEE Transactions on Antennas and Propagation(1991) vol. 39, No. 6, pp. 754-757.
Jordan, E. “Electromagnetic Waves and Radiating Systems: Principles of Broadband Antenna Design”, Second Edition,Prentice Hall International Editions, pp. 601-605.
Evans, D.S., et al. “VHF-UHF Manual: Aerials” Third Edition,RSGB Publication, pp. 7.21-7.22.
Nakano, H., et al. “Extremely Low-Profile Helix Radiating a Circularly Polarized Wave”IEEE Transactions on Antennas and Propagation, vol. 39, No. 6, pp. 754-757, Jun. 1991.
Jordan, E. “Electromagnetic Waves and Radiating Systems: Principles of Broadband Antenna Design”, Second Edition,Prentice Hall International Editions, pp. 601-605, 1968.
Evans, D.S., et al. “VHF-UHF Manual: Aerials” Third Edition,RSGB Publication, pp. 7.21-7.22, 1976.

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