Electronic device having a multi-state antenna ground structure

Details Electronic device having a multi-state antenna ground structure Electronic device having a multi-state antenna ground structure

2005-01-04

2005-01-04

Appiah, Charles (Department: 2686)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S575300, C343S848000

Reexamination Certificate

active

06839577

ABSTRACT:
An electronic device (100) has a multi-state antenna ground structure (428, 500) integrated into the device housing. Configuration of the electronic device (100) for use in one of at least two operable configurations automatically causes a switching of the ground structure to improve antenna efficiency. Metal plates (416, 424) are secured within movable portions (104, 114) of the device housing such that in a first configuration the metal plates are in close proximity and act as a low impedance path for switching the ground structure to a first state. In a second configuration of the electronic device (100) the plates are separated an act as a high impedance path for switching the ground structure to a second state.

REFERENCES:
patent: 5335368 (1994-08-01), Tamura
patent: 5542106 (1996-07-01), Krenz et al.
patent: 5561437 (1996-10-01), Phillips et al.
patent: 5821903 (1998-10-01), Williams
patent: 6266538 (2001-07-01), Waldron
patent: 6327485 (2001-12-01), Waldron
patent: 6342859 (2002-01-01), Kurz et al.
patent: 6421016 (2002-07-01), Phillips et al.
patent: 6490435 (2002-12-01), Ma et al.
patent: 6600450 (2003-07-01), Efanov et al.

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