05079562 is referenced by 49 patents and cites 9 patents.

A multi-band antenna is adapted to receive signals in the AM/FM bands and to receive and transmit signals in a significantly higher frequency band such as that used for cellular telephone. An AM/FM band antenna is formed of a tubular rod, and a higher frequency band antenna is formed using a centerfed coaxial dipole mounted on top of and coaxially with the AM/FM antenna. The dipole is fed by a coaxial rod attached to a coaxial cable extending through the AM/FM antenna. A cylindrical choke is disposed about the coaxial rod and is spaced a predetermined distance from the dipole antenna to reduce coupling between the AM/FM antenna and the high-frequency antenna. The choke functions to position the input impedance of the high-frequency antenna at the base of the choke in a manner so that a short matching transformer may be used at the base of the choke for connection to the coaxial cable. In matching the antenna in this manner at the base of the choke, the best possible VSWR characteristics of the antenna are preserved and the radiation pattern of the antenna's main lobe extends horizontally along a horizontal axis.

Title
Multiband antenna
Application Number
7/547993
Publication Number
5079562
Application Date
July 3, 1990
Publication Date
January 7, 1992
Inventor
James R Hendershot
Arroyo Grande
CA, US
Michael L Brennan
Howell
NJ, US
George D Yarsunas
Vincentown
NJ, US
Agent
Peter C Van Der Sluys
Assignee
Radio Frequency Systems
NJ, US
IPC
H01Q 9/18
H01Q 1/10
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