Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Reexamination Certificate
2005-04-19
2005-04-19
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
C455S078000, C455S114200
Reexamination Certificate
active
06882836
ABSTRACT:
A system and method for suppressing spurious signal leakage in a mobile terminal antenna interface without degrading switch linearity or system insertion loss is disclosed. The antenna interface includes an antenna port, a receive port, a transmit port, and a plurality of switch modes, that may include a receive mode, a transmit mode, and a special isolation mode. To suppress spurious signal leakage from high band transmit and receive ports, a switching mechanism is employed to isolate the receive port from the antenna port in high band transmit mode, and to isolate the transmit port from the antenna port in high band receive mode. A special isolation mode allows simultaneous isolation of the high band transmit and receive ports from the antenna port in low band transmit and receive modes. DC current control circuitry is optionally employed to reduce current drain in transmit and special isolation modes, extending battery life.
REFERENCES:
patent: 6243566 (2001-06-01), Peckham et al.
patent: 0980109 (2000-02-01), None
patent: 1089446 (2001-04-01), None
patent: 2000-013280 (2000-01-01), None
patent: WO 9962195 (1999-12-01), None
Tham et al., “A 2.7-V 900-MHz/1.9-GHz dual-band transceiver IC for digital wireless communication”, Conference Article, J. Journal (Mar. 1999).
Werner Wild, Intermodulation Product Second-Order Interferers in Dual Band Systems, Microwave Journal (Sep. 2000) pp. 200-207.
L. F. Fei, A T/R Diversity RF Switch Design Using PIN Diodes, Applied Microwave & Wireless (Oct. 2000) (Abstract Only).
M. Faulkner, “IM2 Removal in Direct Conversion Receivers”, IEEE VTS 53rd Vehicular Technology Conference, Rhodes, Greece (May 2001) (Abstract Only).
Ericsson Inc.
Moore & Van Allen PLLC
Nguyen Thuan T.
Stephens Gregory A.
Urban Edward F.
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