# US 7,609,215 B2 · Vehicular multiband antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,215 B2 - Document ID: US7609215B2 - Status: Granted - Kind: B2 - Application number: 11/783,824 - Filed: 2007-04-12 - Published: 2008-07-03 - Granted: 2009-10-27 - Earliest claimed: 2006-12-19 - Assignees: BAE Systems Information and Electronic Systems Integration Inc. - Inventors: John T. Apostolos - Web page: https://patentgrep.com/patent/US7609215B2 ## CPC - H01Q 19/30: the primary active element being centre-fed and substantially straight, e.g. Yagi antenna - H01Q 5/321: within a radiating element or between connected radiating elements - H01Q 5/40: Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The antenna according to claim 1, wherein the meanderline is implemented using at least two layers of a meanderline. ### Claim 3 (depends on 1) The antenna according to claim 1, wherein the meanderline is implemented using at least four layers of a meanderline. ### Claim 4 (depends on 2) The antenna according to claim 2, wherein the meanderline is manufactured on a printed circuit board. ### Claim 5 (depends on 1) The antenna according to claim 1, wherein the meanderline is self shielding. ### Claim 6 (depends on 1) The antenna according to claim 1, wherein the meanderline is not self shielding. ### Claim 7 (depends on 1) The antenna according to claim 1, wherein the radiating elements are supplied using a coaxial cable and a reverse excitation feed. ### Claim 8 (depends on 1) The coaxial antenna according to claim 1, wherein the first frequency range is lower than the second frequency range. ### Claim 9 (depends on 1) The coaxial antenna according to claim 1, wherein the first frequency range is higher than the second frequency range. ### Claim 10 (depends on 1) The coaxial antenna according to claim 1, wherein the antenna is capable of use for at least one of transmitting and receiving at each of the frequency ranges. ### Claim 11 (depends on 1) The coaxial antenna according to claim 1, wherein the communication with the antenna at the first and second frequency ranges occurs through a common conductor. ### Claim 12 (depends on 11) The coaxial antenna according to claim 11, wherein the common conductor forms at least part of the radiating elements capable of operating at the first and second frequency ranges. ### Claim 13 (depends on 11) The coaxial antenna according to claim 11, wherein first and second frequency ranges comprise frequency ranges in the UHF and VHF frequency bands, respectively. ### Claim 14 (depends on 11) The coaxial antenna according to claim 11, wherein the common conductor is a shielded conductor. ### Claim 15 (depends on 11) The coaxial antenna according to claim 11, wherein the common conductor is a coaxial cable. ### Claim 16 (depends on 11) The coaxial antenna according to claim 11, further comprising a second conductor capable of carrying a third frequency range; and wherein the antenna includes a base end and a top end, the common conductor and second conductor enter the base and the second conductor is coupled to an antenna element at the top end of the antenna. ### Claim 17 (depends on 16) The coaxial antenna according to claim 16, wherein the third frequency range is associated with the L band frequency range. ### Claim 18 (depends on 16) The coaxial antenna according to claim 16, wherein the antenna element at the top comprises a satellite antenna. ### Claim 19 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. ### Claim 20 (depends on 19) The antenna according to claim 19, wherein the meanderline is implemented as at least of the following: a multi-layered meanderline, a printed circuit board, a self shielded meanderline. ### Claim 21 (depends on 19) The antenna according to claim 19, wherein the first and second frequency ranges comprise frequency ranges in the UHF and VHF frequency bands, respectively. ### Claim 22 (depends on 21) The coaxial antenna according to claim 21, further comprising a second conductor capable of carrying a third frequency range; and wherein the antenna includes a base end and a top end, the common conductor and second conductor enter the base and the second conductor is coupled to an antenna element at the top end of the antenna. ### Claim 23 (depends on 22) The coaxial antenna according to claim 22, wherein the third frequency range is associated with the L band frequency range.