1976-04-02
1978-06-27
Griffin, Robert L.
325178, H04B 700
Patent
active
040978087
ABSTRACT:
A system and method for providing entertainment and/or information to vehicles travelling along a roadway. The system of the invention enables the driver to tune his car radio to a single station while travelling on a specific long-distance road, and to receive high quality and continuous radio reception for the duration of his trip on the road. An antenna comprised of at least one conductor is strung adjacent to the roadway and parallel thereto, and is excited with an amplitude modulated radio frequency signal within 550 to 1650 khz broadcast band so that each vertical slice through the antenna is effective as an electrical multipole. The antenna excitation signal is arranged to be large enough so that the vehicles on the roadway, which are substantially within the near field of the antenna, receive substantial and usable radio signals, but small enough so that radiation at distances beyond the roadway is negligible, so as not to interfere with broadcast reception beyond the highway.
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patent: 3766476 (1973-10-01), Silitch
Bean James L.
Bookbinder Mace E.
Griffin Robert L.
Marine Electric Corporation
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