Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1998-09-09
1999-12-14
Wong, Don
Communications: radio wave antennas
Antennas
With radio cabinet
343895, 343901, H01Q 124
Patent
active
060023724
ABSTRACT:
A retractable antenna for a wireless communication device such as a cellular telephone including a housing having a receptacle at the upper end thereof which is RF coupled to the telephone circuitry. The antenna comprises a metal connector which is RF coupled to the housing receptacle. Telescoping first and second radiators are slidably mounted in the metal connector and may be moved from a fully extended position to a fully retracted position. A helical antenna is operatively supported by the metal connector and is RF insulated therefrom. When the antenna is in its fully retracted position, the helical antenna is in circuit, with the telescoping radiators being out of circuit. When the antenna is in its fully extended position, the telescoping radiators are in circuit and the helical antenna is out of circuit. The overall length of the antenna, when in its fully extended position, is greater than the height of the telephone housing.
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"Lightweight Trap Antennas-Some Thoughts" by Doug DeMaw, Jun. 1983.
Centurion International, Inc.
Phan Tho
Thomte Dennis L.
Wong Don
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