Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1978-04-10
1979-08-21
Richardson, Robert L.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
325133, 325308, 343745, 179 1AT, H04B 100
Patent
active
041654870
ABSTRACT:
Low power apparatus and method for tuning portable receivers of patrons of an establishment (such as an auditorium) to a predetermined frequency and communicating audio frequency information to the patrons via the portable receivers. An audio signal is derived from an audio frequency public address sound system and inputted to a modulator to modulate a radio frequency carrier signal. The modulated carrier signal is amplified and transmitted by means of a loop antenna surrounding the region of the establishment wherein the patrons and their portable receivers are situated. A very low power modulated radio frequency signal is derived from a transmitter including a modulator and an amplifier and is inputted to a receiver tuning aid circuit positioned near the entrance of the establishment. The tuning aid circuit drives a small ferrite core antenna which radiates a signal which enables the patrons to easily tune their portable receivers to the carrier signal frequency by positioning the receivers close to the ferrite core antenna and tuning the receivers for the loudest audio signal.
REFERENCES:
patent: 2567431 (1951-09-01), Halstead
patent: 2980793 (1961-04-01), Daniel
patent: 3107330 (1963-10-01), Hausen
patent: 3235804 (1966-02-01), McIntosh
patent: 3585505 (1971-06-01), Ogilvy
patent: 3660762 (1972-05-01), Smith
Terman, et al., "Electronic and Radio Engineering," 1955; p. 935.
Stoner and Earnshaw, "The Transistor Radio Handbook," 1963; pp. 69-70.
Norris, "Radio Engineering," 1952, pp. 127-128.
Gerasimow Alexander
Richardson Robert L.
LandOfFree
Low power system and method for communicating audio information does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low power system and method for communicating audio information , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low power system and method for communicating audio information will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1324962