High isolation mixer

Details High isolation mixer High isolation mixer

2005-09-20

2005-09-20

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

C455S330000

Reexamination Certificate

active

06947717

ABSTRACT:
A mixer with improved isolation between the RF and local oscillator frequency signals. The mixer has a substrate. A pair of cores are mounted to the substrate. Windings are wound on the cores to from a pair of baluns. A diode ring is connected between the baluns. The windings are formed from a first and second twisted pair of wires on one core and a third and fourth twisted pair of wires on another core. Some of the wires are wound on the cores but not twisted together. This winding configuration achieves superior balance between the baluns and good isolation.

REFERENCES:
patent: 4375700 (1983-03-01), Hallford
patent: 5280647 (1994-01-01), Arai et al.
patent: 5731740 (1998-03-01), van de Westerlo
patent: 6653910 (2003-11-01), Escalera et al.

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