Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1997-04-30
1999-08-31
Font, Frank G.
Communications: radio wave antennas
Antennas
With radio cabinet
343895, 343900, H01Q 124
Patent
active
059459530
ABSTRACT:
An antenna assembly for a portable radio apparatus, such as a cellular phone, having a housing with a signal line therein includes a helical antenna extending from the housing and having first and second helical portions which are electrically separated from each other and a rod antenna movable relative to the helical antenna between a retracted position, in which the rod antenna is removed from within the helical antenna into the interior of the housing, and an extended position, in which the rod antenna extends through the helical antenna to the exterior of the housing. One of the first and second helical portions of the helical antenna is electrically connected with the signal line within the housing so that when the rod antenna in its retracted position, the one helical portion connected with the signal line operates as a radiator, and an electrical connector is moveable with the rod antenna for electrically connecting the first and second helical portions with each other when the rod antenna is in its extended positions so that the first and second helical portions then operate jointly as a radiator and also match with the rod antenna which is electromagnetically coupled with the signal line through the helical antenna so as to act principally as a radiator.
REFERENCES:
patent: 5764191 (1998-06-01), Tsuda
patent: 5861859 (1999-01-01), Kanayama et al.
Toriyama Ichiro
Tsuda Shinichiro
Font Frank G.
Frommer William S.
Lauchman Layla
Sony Corporation
Sony Electronics Inc.
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