Portable telephone and antenna device

Details Portable telephone and antenna device Portable telephone and antenna device

1998-02-06

2000-06-13

Le, Hoanganh

Communications: radio wave antennas

Antennas

With radio cabinet

343901, 343895, H01Q 124

Patent

active

060754877

ABSTRACT:
Corresponding to a connector for an external antenna arranged at a bottom end portion of a housing of a portable telephone, a RF transmitter-receiver circuit and a feeding spring are provided in a lower part of a circuit substrate, electric power is supplied to a bottom end portion of a rod antenna longer than .lambda./4, and a supporting fitting arranged at a top end portion of the housing, for contacting the intermediate portion of the rod antenna is connected to a ground of the circuit substrate through a ground spring, whereby a portion of the rod antenna above the circuit substrate stably operates as a .lambda./4 mono-pole antenna.

REFERENCES:
patent: 5739792 (1998-04-01), Hassemer et al.
patent: 5861859 (1999-01-01), Kanayama et al.
patent: 5867127 (1999-02-01), Black et al.

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