Low wind resistance antennas using cylindrical radiating and ref

Details Low wind resistance antennas using cylindrical radiating and ref Low wind resistance antennas using cylindrical radiating and ref

1995-02-17

1997-02-25

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343700MS, 343815, 343817, 343872, H01Q 2112

Patent

active

056063334

ABSTRACT:
Multi-beam antennas with relatively large effective apertures for high antenna gain are provided for tower or pole mounting for cellular and other uses. Low wind resistance is achieved by use of thin cylindrical radiating units and thin cylindrical tuned reflector units. Each radiating unit includes separately excited upper and lower radiators, each including a microstrip pattern of a phase reversed series of half-wave transmission line sections on a substrate enclosed in a fiberglass tube radome. Each tuned reflector unit includes a resonant stack of electrically isolated metal rods enclosed in a fiberglass radome. In one embodiment, four cylindrical radiating units, each including upper and lower radiators, are laterally spaced in front of upper and lower reflector configurations, each including seven laterally spaced tuned reflector units. Four beams are provided by a beam forming network arranged to couple antenna element signal feeds to the four upper radiators and corresponding reverse phase signal feeds to the four lower radiators.

REFERENCES:
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patent: 3470560 (1969-09-01), Fray
patent: 3564551 (1970-01-01), Mills et al.
patent: 3836977 (1974-09-01), Wheeler
patent: 4516132 (1985-05-01), Bond et al.
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patent: 5285211 (1994-02-01), Herper et al.
patent: 5339089 (1994-08-01), Dienes
patent: 5363115 (1994-11-01), Lipkin et al.
Wheeler, H. A., "A Vertical Antenna Made of Transposed Sections of Coaxial Line", pp. 160-164, IRE Convention Record, vol. 4, Part 1, 1956 no month.

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