Antenna equipment

Details Antenna equipment Antenna equipment

1994-09-23

1997-04-01

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With radio cabinet

343895, 343901, 343725, 343791, H01Q 124, H01Q 136, H01Q 2100

Patent

active

056171056

ABSTRACT:
A rod antenna element is connected at its lower end to one end of a coaxial impedance converter, the other end of which is connected to a feeder. A coil antenna element is capacitively coupled to the rod antenna element to provide a double resonance characteristic. When held at its retracted position, the rod antenna element, inserted in an outer conductor of the coaxial impedance converter, may preferably form an inner conductor larger in diameter than that when the rod antenna element is at its extended-out position, and the rod antenna element is connected to a coil antenna element with a low impedance.

REFERENCES:
patent: 2418961 (1947-04-01), Wehner
patent: 3798654 (1974-03-01), Martino et al.
patent: 3945013 (1976-03-01), Brunner et al.
patent: 4494122 (1985-01-01), Garay et al.
patent: 4868576 (1989-09-01), Johnson, Jr.
patent: 5317325 (1994-05-01), Bottomley
patent: 5353036 (1994-10-01), Baldry
patent: 5389938 (1995-02-01), Harrison
patent: 5465098 (1995-11-01), Fujisawa et al.

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