Communications: radio wave antennas – Antennas – Antenna components
Reexamination Certificate
2007-10-11
2008-09-30
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Antenna components
C343S756000, C333S134000, C333S202000
Reexamination Certificate
active
07429962
ABSTRACT:
A planar multi-layer transreflector for generating collimated coherent energy comprises one or more of insulating layers between two or more metallic layers. The transreflector substantially reflects a cross-polarized component of an incident millimeter-wave signal and substantially transmits the remaining portions of the incident millimeter-wave signal. Each of the metallic layers comprises a plurality of rectangles arranged in a grid pattern radially varying in size within circumferential regions. The reflected cross-polarized component may be substantially orthogonal to the transmitted remaining portions. A substantially collimated and coherent wavefront comprising the remaining portions may be produced in a first direction, and substantially collimated and coherent wavefront comprising the cross-polarized components may be produced in a second direction.
REFERENCES:
patent: 6396451 (2002-05-01), Wu et al.
patent: 2006/0128336 (2006-06-01), Waltman et al.
Gorrie Gregory J.
Ho Tan
Raytheon Company
Schwegman Lundberg & Woessner, P.A.
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