Multibit phase shifter with active and passive phase bits,...

Details Multibit phase shifter with active and passive phase bits,... Multibit phase shifter with active and passive phase bits,...

2007-02-06

2007-02-06

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S156000

Reexamination Certificate

active

10901525

ABSTRACT:
An RF phase shifter includes the cascade of active and passive RF phase shift bits, having different phase increments. The active phase shift bit includes a FET with source and drain. First and second RF single-pole, double throw switches have their common elements coupled to the source and drain, respectively, for selectively connecting one of the in-phase source signals and out-of-phase drain signals to a third switch, and for coupling the non-selected signal to a reference. The third switch outputs the available signal. Additional phase increments may be included to achieve phase shifts or differences other than 180°.

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patent: 5337027 (1994-08-01), Namordi et al.
patent: 6525627 (2003-02-01), Nakada

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