Radiotelephones with integrated matching antenna systems

Details Radiotelephones with integrated matching antenna systems Radiotelephones with integrated matching antenna systems

1997-04-29

2000-01-18

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 90, 455575, H04Q 720

Patent

active

06016431&

ABSTRACT:
Radiotelephones configured with integrated matching circuit components in the housing and antenna are disclosed. The present invention configures the antenna and the associated housing receiving passage to define a capacitor and inductor to match the differing impedances generated by retractable top load antennas (retracted and extended impedances) without requiring a separate switching circuit and wiping contacts.

REFERENCES:
patent: 4725845 (1988-02-01), Phillips
patent: 4748450 (1988-05-01), Hines et al.
patent: 5166695 (1992-11-01), Chan et al.
patent: 5374937 (1994-12-01), Tsunekawa et al.
patent: 5583519 (1996-12-01), Koike
patent: 5596334 (1997-01-01), Boyee et al.
patent: 5659889 (1997-08-01), Cockson
patent: 5739792 (1998-04-01), Hassemer et al.
patent: 5754141 (1998-05-01), Thompson et al.
patent: 5874921 (1999-02-01), Doherty et al.
PCT International Search Report, PCT/US98/08131, Jul. 24, 1998.

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