Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Reexamination Certificate
2011-08-30
2011-08-30
Lee, Benny (Department: 2817)
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
C333S164000, C333S161000, C333S004000
Reexamination Certificate
active
08009114
ABSTRACT:
A switchable 0°/180° phase shifter on a balanced transmission line is provided. In one embodiment, the invention relates to an apparatus for providing 0°/180° phase shifting for a transmit/receive antenna pair including a transmit element and a receive element coupled by a balanced transmission line having two sections, the apparatus including a first section of the balanced transmission line, the first section including a first conductor and a second conductor, a second section of the balanced transmission line, the second section including a third conductor and a fourth conductor, and a switch disposed between the first section and the second section, wherein in a first configuration, the switch couples the first conductor to the third conductor and the second conductor to the fourth conductor, and in a second configuration, the switch couples the first conductor to the fourth conductor and the second conductor to the third conductor.
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European Search Report for European Application No. 10 442.0-1248, European Search Report dated Jun. 8, 2010 and mailed Jun. 15, 2010 (5 pgs.).
Hauhe Mark
Quan Clifton
Christie Parker & Hale LLP
Lee Benny
Raytheon Company
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