Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2008-06-11
2010-06-15
Owens, Douglas W (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S772000, C343S779000
Reexamination Certificate
active
07737904
ABSTRACT:
An antenna system for transmitting and/or receiving radio frequency (RF) signals in multiple frequency bands includes a horn antenna and a feed network. The horn antenna may transmit and/or receive RF signals in multiple frequency bands that are spread over more than an octave bandwidth with at least a 2.44-to-1 bandwidth ratio. The horn antenna includes a throat, an aperture, and an interior surface. The feed network includes a first waveguide section, a first junction, one or more first filters, and a first step-down waveguide section. The first waveguide section can provide a matching network and transmit and/or receive the RF signals in the multiple frequency bands. The first junction can transmit and/or receive the RF signals in first selected band(s) of the multiple frequency bands. The first step-down waveguide section may transmit and/or receive the RF signals in second selected band(s) of the multiple frequency bands.
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Baran Chris G.
Dhillon Surjit S.
Hsu Chih-Chien
Rao Sudhakar K.
Duong Dieu Hien T
Lockheed Martin Corporation
McDermott Will & Emery LLP
Owens Douglas W
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