Analog phase shifter

Details Analog phase shifter Analog phase shifter

1990-04-30

1991-07-02

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333138, H01P 1185, H03H 720

Patent

active

050288920

ABSTRACT:
An analog voltage-controlled phase shifter is disclosed which is smaller in size and provides a larger phase shift for a smaller change of capacitance of presently available voltage controlled phase shifters. These unexpected advantages are obtained by using lumped elements to simulate the normally used .lambda./4 transmission lines of the hybrid portion of the phase shifter and by eliminating or reducing the value of the capacitors normally present at the varactor nodes of the hybrid. The capacitance fully or partially removed from the varactor nodes of the hybrid can be selectively fully or partially added to the varactors.

REFERENCES:
patent: 4638269 (1987-01-01), Dawson et al.
patent: 4859972 (1989-08-01), Franke et al.
Gupta et al., "Quasi-Lumped-Element 3 and 4 Port Networks for MIC and MMIC Applications", 1984, IEEE MTT-S Digest, pp. 409-411.

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