Dual-band antenna coupler for a portable radiotelephone

Details Dual-band antenna coupler for a portable radiotelephone Dual-band antenna coupler for a portable radiotelephone

1996-12-04

1998-12-22

Gross, Anita Pellman

Communications: radio wave antennas

Antennas

With radio cabinet

343713, 343715, 343841, 343895, 455 89, 455 90, H01Q 124, H01Q 132, H01Q 152

Patent

active

058524215

ABSTRACT:
A dual-band antenna coupler for use in an adapter for portable radiotelephone. A plurality of curved bands of metal are positioned on a ground plane, with at least two of the plurality of curved bands of metal being electrically isolated from the ground plane so as to couple radio frequency (RF) signals to and from the antenna of the portable radiotelephone. The isolated curved bands of metal couple RF signals between the antenna of the portable radiotelephone and first and second matching circuits designed to match the portable radiotelephone antenna at each of the respective frequency bands. A selector switch coupled to the output of the matching circuits selects the appropriate matching circuit output for connection to an external antenna. The adapter also includes at least one ground pin mounted on the ground plane. When the portable radiotelephone is interfaced with the antenna coupler, the ground pin makes electrical contact with a ground reference connection on the portable radiotelephone.

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patent: 5652599 (1997-07-01), Pitta et al.
patent: 5710984 (1998-01-01), Millar et al.

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