Circularly polarized omnidirectional in-building signal booster apparatus and method
First Claim
1. A system for rebroadcasting a source signal originating from a location external to the system, comprising:
- a receiving antenna configured to acquire a broadcast radio transmission, wherein directionality of the receiving antenna in elevation and azimuth and receiving antenna gain are prescribed, and wherein receiving antenna polarization is elliptical with a first handedness;
a transmitting antenna configured to radiate a broadcast radio transmission, wherein a radiation pattern of the transmitting antenna is substantially omnidirectional with respect to azimuth, and wherein transmitting antenna polarization is elliptical with a second handedness; and
an interconnecting signal line coupling the receiving and transmitting antennas.
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Accused Products
Abstract
A rebroadcasting apparatus for mobile media includes a receiving antenna and a transmitting antenna. The signal to be rebroadcast is received with a circularly polarized directional antenna. The transmitting antenna has circular polarization opposite to the polarization of the receiving antenna. Amplifiers and filters may be included between receiving and transmitting antennas to regulate retransmitted signal quality. The transmitting antenna uses one or more bays of quasi-helical dipole radiators excited using manifold feed equipped with tuning paddles. The transmitting antenna may be formed from light-weight sheet metal or other readily mass-produced materials. The transmitting antenna may be housed within an ordinary security camera enclosure or similar radio-transparent housing.
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Citations
22 Claims
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1. A system for rebroadcasting a source signal originating from a location external to the system, comprising:
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a receiving antenna configured to acquire a broadcast radio transmission, wherein directionality of the receiving antenna in elevation and azimuth and receiving antenna gain are prescribed, and wherein receiving antenna polarization is elliptical with a first handedness; a transmitting antenna configured to radiate a broadcast radio transmission, wherein a radiation pattern of the transmitting antenna is substantially omnidirectional with respect to azimuth, and wherein transmitting antenna polarization is elliptical with a second handedness; and an interconnecting signal line coupling the receiving and transmitting antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for rebroadcasting a source signal originating from a location external to the system, comprising:
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means for receiving an electromagnetic signal from a broadcast radio transmission, wherein the means for receiving has elliptical polarization with a first handedness; means for retransmitting an electromagnetic signal from a broadcast radio transmission, wherein the means for retransmitting has elliptical polarization with a second handedness, opposite to the handedness of the means for receiving; and means for coupling a signal from the means for receiving to the means for retransmitting. - View Dependent Claims (17, 18, 19)
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20. A method for rebroadcasting a source signal originating from a location external to the system, comprising:
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receiving an electromagnetic signal from a broadcast radio transmission having a first handedness of elliptical polarization; transferring the signal to an amplifier, wherein the amplifier performs the steps of; accepting the signal; attenuating out-of-band signal energy; adjusting relative phase of in-band signal frequency components; increasing overall signal power; regulating overall signal power; and furnishing the amplified signal for retransmission; applying the received and amplified signal to a radio signal emitter having a second handedness of elliptical polarization; and coupling the signal from the emitter to a surrounding region. - View Dependent Claims (21, 22)
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Specification