Cordless telephone system

Details Cordless telephone system Cordless telephone system

1976-02-24

1977-06-28

Claffy, Kathleen H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343905, 325364, H04Q 704

Patent

active

040327230

ABSTRACT:
A duplex cordless telephone system with one link operating at approximately 1.7 Mhz is given improved range by utilizing only one side of the power cord for signal transmitting purposes at the fixed or base station and substituting a loaded conductor, free of confinement in a conduit, for the other side of the power cord normally used for signal transmission, thus forming a doublet antenna. Further, this improved system provides an "out-of-range" indicator on the mobile or remote telephone and, if desired, on the base station, which indicates when the cordless telephone is at a range in excess of the operating capability of the system.

REFERENCES:
patent: 2218830 (1940-10-01), Rose et al.
patent: 2915627 (1959-12-01), Spindler
patent: 3240879 (1966-03-01), Bryant
patent: 3290601 (1966-12-01), Pinizzotto et al.
patent: 3317841 (1967-05-01), Umanoff
patent: 3333201 (1967-07-01), Hopengarten
patent: 3365669 (1968-01-01), Funaki et al.
patent: 3680128 (1972-07-01), Wille et al.

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