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US 7,609,215 B2Granted
Vehicular multiband antenna
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorJohn T. Apostolos
Life of this patent
Estimating the term…
Abstract
A coaxial antenna is implemented that combines a VHF and UHF antenna on a common radiating element. The antenna may further include a satellite antenna that, together with the VHF/UHF antenna fits into a whip antenna footprint. The antenna incorporates chokes that may be implemented using meanderline techniques.
Claims23
A coaxial antenna capable of operating in at least two different frequency ranges, comprising:
- radiating elements capable of operating in a first frequency range of interest;
- chokes that limit the operating efficiency of at least portions of the radiating elements at the second frequency range;
- a sleeve coupled to the radiating elements;
- and
- at least two matching networks, a first one of the matching network coupled between the sleeve and a ground potential and the second one of the matching networks coupled to an antenna feed capable of coupling signals at the first and second frequency ranges to the radiating elements;
- wherein the choked portions of the radiating elements are not capable of efficient operation at the second frequency range of interest;
- and
- wherein at least one choke is implemented as a meanderline.
5 more elements
A coaxial antenna capable of operating at in at least two different frequency ranges, comprising:
- radiating elements capable of operating in a first frequency range of interest;
- chokes that limit the operating efficiency of at least portions of the radiating elements at the second frequency range;
- a sleeve coupled to the radiating elements;
- at least two matching networks, a first one of the matching network coupled between the sleeve and a ground potential and the second one of the matching networks coupled to an antenna feed capable of coupling signals at the first and second frequency ranges to the radiating elements;
- and
- a common conductor coupled to the antenna feed having a reverse excitation coupling;
- and
- wherein the communication with the antenna at the first and second frequency ranges occurs through the common conductor, wherein the choked portions of the radiating elements are not capable of efficient operation at the second frequency range of interest, and wherein at least one choke is implemented as a meanderline.
5 more elements
Dependencies are inferred from the claim text.