Communications: radio wave antennas – Antennas – With means for moving directive antenna for scanning,...
Reexamination Certificate
2011-03-15
2011-03-15
Nguyen, Hoang V (Department: 2821)
Communications: radio wave antennas
Antennas
With means for moving directive antenna for scanning,...
C343S763000, C333S156000, C333S161000
Reexamination Certificate
active
07907096
ABSTRACT:
A phase shifter includes two or more conductive strips, an input line and a wiper coupled to both the input line and the conductive strips. Rotation of the wiper about a pivot point alters the path lengths between the input line and output ports or antenna elements connected to the conductive strips. The wiper is a multi-bladed wiper. Phase errors in multi-bladed wiper-type phase shifters are reduced. Arrangements for reduction of phase shifter size or increase in phase shift range are described.
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Extended European Search Report related to European Appliction No. 09151229.3-2220.
Timofeev Igor E.
Xiangyang Ai
Zimmerman Martin L.
Andrew LLC
Husch & Blackwell LLP
Nguyen Hoang V
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