Phase shifter circuit

Details Phase shifter circuit Phase shifter circuit

2007-05-17

2008-11-04

Le, Don P (Department: 2819)

Wave transmission lines and networks

Coupling networks

Delay lines including a lumped parameter

C333S165000

Reexamination Certificate

active

07446630

ABSTRACT:
A full range phase shifter circuit includes a power divider, a hybrid coupler, a differential phase shifter, a power combiner and switched attenuators. The power divider, hybrid coupler, differential phase shifter and power combiner comprise lumped elements and can be integrated in semiconductor processes, decreasing the circuit size of the full range phase shifter.

REFERENCES:
patent: 3976958 (1976-08-01), Seidel
patent: 4298873 (1981-11-01), Roberts
Kim et al., “A New Active Phase Shifter Using a Vector Sum Method”, IEEE Microwave and Guided Wave Letters, vol. 10 No. 6, Jun. 2000, p. 233-235.
Viveiros, David et al., “A Turnable All-Pass MMIC Active Phase Shifter,” IEEE Transactions on Microwave Theory and Techniques, vol. 50, No. 8, Aug. 2002, p. 1885-1889.

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