Communications: radio wave antennas – Antennas – With means for moving directive antenna for scanning,...
Reexamination Certificate
2006-09-05
2006-09-05
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
With means for moving directive antenna for scanning,...
C333S02100R
Reexamination Certificate
active
07102581
ABSTRACT:
A multiband waveguide reflector antenna feed comprises waveguide feeds in a concentric architecture. A waveguide feed is located in the center and coaxial waveguide feeds are disposed around the center feed. The waveguide feeds may be all-metallic with the center feed operating in a TE11mode and the coaxial feeds operating in a coaxial TE11mode. The waveguide feeds may have electromagnetic band gap (EBG) surfaces on waveguide surfaces. The center waveguide feed may have an EBG outer conductor surface and operate in a circular waveguide TEM mode. The coaxial waveguide feeds may have EBG inner and outer conductors and operate in a circular waveguide TEM mode. The coaxial feeds may have EBG inner conductors and near perfect electrical conductor (PEC) outer conductors and operate in a circular waveguide-like TE11mode or may comprise EBG outer conductors and PEC inner conductors and operate in a quasi-TEM waveguide mode.
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A Minh Dieu
Chen Shih-Chao
Eppele Kyle
Jensen Nathan O.
Rockwell Collins, Inc.
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