Variable differential phase shifter having a divider wiper arm

Details Variable differential phase shifter having a divider wiper arm Variable differential phase shifter having a divider wiper arm

2007-11-27

2007-11-27

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S156000, C333S128000, C333S117000

Reexamination Certificate

active

11143377

ABSTRACT:
A variable differential phase shifter including an isolation element providing good isolation between output ports, good return loss and reduced reflections. In one embodiment a Wilkinson divider is incorporated in the wiper arm of a wiper type variable differential phase shifter. In another embodiment a linear phase shifter incorporates a Wilkinson divider. Multistage embodiments are also disclosed. The variable differential phase shifter may be used in combination with a hybrid coupler to provide an isolated variable power divider. The variable differential phase shifter may be utilized in a variety of feed networks and antenna arrays to vary beam tilt, beam azimuth and beam width. Antennas incorporating the phase shifter exhibit low variation of half power beam width with frequency and reduced side lobes.

REFERENCES:
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patent: 2951996 (1960-09-01), Pan
patent: 4636755 (1987-01-01), Gibbs
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patent: 5705962 (1998-01-01), Fleeger et al.
patent: 6831602 (2004-12-01), McKinzie et al.
patent: 6850130 (2005-02-01), Gottl et al.
patent: 6922169 (2005-07-01), Moh'd Izzat et al.
patent: WO 02/05383 (2002-01-01), None

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