| US 7,589,684 B2 | ||
| Vehicular multiband antenna | ||
| John Apostolos, Lyndeborough, N.H. (US) | ||
| Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, N.H. (US) | ||
| Filed on Dec. 19, 2006, as Appl. No. 11/641,045. | ||
| Prior Publication US 2008/0143632 A1, Jun. 19, 2008 | ||
| Int. Cl. H01Q 1/32 (2006.01) | ||
| U.S. Cl. 343—713 | 12 Claims |
| 1. A coaxial antenna capable of operating in at least three 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 through a common conductor; and
a second conductor carrying a third frequency range through the antenna;
wherein the choked portions of the radiating elements are not capable of efficient operation at the second frequency range
of interest.
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