Multiple service user terminal

Details Multiple service user terminal Multiple service user terminal

1997-11-13

2000-09-19

To, Doris H.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 121, 455427, 455 82, 455575, 343895, 333129, 333132, H04B 146

Patent

active

06122524&

ABSTRACT:
A user terminal in the form of a handset 1 is disclosed wherein a common antenna 3 is operative to provide transmission and reception on a plurality of selectable services at different frequencies, the antenna being resonant and matched for at least one of the services, and non-resonant and unmatched for other services. The user terminal handset 1 employs a common antenna 3 directly for that service or those services for which the antenna 3 is matched and resonant. The user terminal handset 1 employs the common antenna 3 unmatched and non-resonant for those services whereon unmatched non-resonant antenna use is acceptable. The user terminal handset 1 comprises means, for approximately or precisely adjusting the match to the common antenna 3 for other services.

REFERENCES:
patent: 3562597 (1971-02-01), White
patent: 5170490 (1992-12-01), Cannon et al.
patent: 5303396 (1994-04-01), Ooyagi et al.
patent: 5386203 (1995-01-01), Ishihara
patent: 5479178 (1995-12-01), Ha
patent: 5572227 (1996-11-01), Pal et al.
patent: 5634203 (1997-05-01), Ghaem
patent: 5652599 (1997-07-01), Pitta et al.
patent: 5678199 (1997-10-01), Birth et al.
patent: 5732359 (1998-03-01), Baranowsky, II et al.

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