Frequency translating repeater with low cost high...

Details Frequency translating repeater with low cost high... Frequency translating repeater with low cost high...

2007-03-06

2007-03-06

Anderson, Matthew D. (Department: 2618)

Telecommunications

Carrier wave repeater or relay system

With frequency conversion

C455S015000, C455S209000

Reexamination Certificate

active

11143927

ABSTRACT:
A frequency translating repeater (120) for use in a time division duplex (TDD) radio protocol communications system includes local oscillator (LO) circuits (210, 310, and410) to facilitate repeating by providing isolation, reduced phase noise, reduced pulling, and the like. Tunable LOs (441, 442) can be directly coupled to down-converters (413, 414) and up-converters (426, 427) for increased isolation, reduced phase noise, less stringent frequency accuracy, and a reduced potential for pulling.

REFERENCES:
patent: 4001691 (1977-01-01), Gruenberg
patent: 4783843 (1988-11-01), Leff et al.
patent: 5023930 (1991-06-01), Leslie
patent: 5471642 (1995-11-01), Palmer
patent: 5745846 (1998-04-01), Myer et al.
patent: 5987304 (1999-11-01), Latt
patent: 6188719 (2001-02-01), Collomby
patent: 2004/0157551 (2004-08-01), Ganey et al.
International Search Report in corresponding International application No. PCT/US05/19585 dated May 22, 2006.

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