Communications: radio wave antennas – Antennas – Antenna components
Reexamination Certificate
2006-12-19
2006-12-19
Wimer, Michael C. (Department: 2821)
Communications: radio wave antennas
Antennas
Antenna components
C343S778000
Reexamination Certificate
active
07151507
ABSTRACT:
A dual-band electromagnetic band gap (EBG) electronically scanned antenna utilizing frequency selective surfaces (FSS) uses FSS waveguide phase shifters. Each FSS waveguide phase shifter has a low-frequency phase shifter with low-frequency EBG devices on vertical waveguide walls, horizontal waveguide broadwalls that are substantially twice the width of the vertical waveguide walls and an FSS located at the center of the horizontal waveguide broadwalls. Two high-frequency phase shifters are formed within the low-frequency phase shifter. Each high-frequency phase shifter comprises a vertical waveguide wall, the FSS, half of the horizontal waveguide broadwalls, and high-frequency EBG devices located on each half of the horizontal waveguide broadwalls, The FSS is transparent at a low frequency and opaque at a high frequency.
REFERENCES:
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patent: 6806846 (2004-10-01), West
patent: 6822617 (2004-11-01), Mather et al.
patent: 6822622 (2004-11-01), Crawford et al.
“Characteristics of Ka Band Waveguide Using Electromagnetic Crystal Sidewalls”, by J. A. Higgins et al., 2002 IEEE MTT-S International Microwave Symposium, Seattle, WA, Jun. 2002.
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“A Dual-Frequency Band Waveguide Using FSS”, R. J. Langley, IEEE Microwave and Guided Wave Letters, vol. 3, No. 1, Jan. 1993.
Eppele Kyle
Jensen Nathan O.
Rockwell Collins, Inc.
Wimer Michael C.
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