Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Reexamination Certificate
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:
patent: 2831169 (1958-04-01), Casal
patent: 2951996 (1960-09-01), Pan
patent: 4636755 (1987-01-01), Gibbs
patent: 4737747 (1988-04-01), Henderson et al.
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
Veihl Jonathon C.
Zimmerman Martin L.
Andrew Corporation
Lee Benny
Welsh & Katz Ltd.
LandOfFree
Variable differential phase shifter having a divider wiper arm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable differential phase shifter having a divider wiper arm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable differential phase shifter having a divider wiper arm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3830084