Antenna coupler for portable telephone

Details Antenna coupler for portable telephone Antenna coupler for portable telephone

1998-04-02

1999-11-16

Wong, Don

Communications: radio wave antennas

Antennas

With radio cabinet

343713, 343841, 325312, H01Q 124

Patent

active

059866080

ABSTRACT:
The present invention provides a system for coupling a portable telephone with a built-in antenna to an external antenna. The portable telephone built-in antenna includes an exposed direct electrical contact at its base. When the portable telephone unit is placed into a receiving cavity in in external antenna coupling unit, the exposed contact is engaged by an antenna clip for connection to the external antenna. A two-section choke in the coupling unit provides shielding for the built-in antenna. The first section of the choke is coupled to the ground plane of the portable telephone, and the second section of the choke surrounds the antenna. In a preferred embodiment of the invention, the choke provides shielding of the built-in antenna at a lower and at a higher frequency band.

REFERENCES:
patent: 4031468 (1977-06-01), Ziebell et al.
patent: 5835071 (1996-09-01), Phelps
patent: 5852421 (1996-12-01), Maldonado

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