Antenna low-noise q spoiling circuit

Details Antenna low-noise q spoiling circuit Antenna low-noise q spoiling circuit

H - Electricity

04

B

351/60

H04B 1/18 (2006.01) H01Q 7/08 (2006.01) H03H 11/46 (2006.01)

Patent

CA 1148254

ABSTRACT OF THE DISCLOSURE An input coupling circuit for detuning the Q of a high-Q ferrite rod antenna is disclosed. A high-impedence low-noise amplifier is used to amplify the output signal from the LC resonant tank of the rod antenna. A portion of the amplified signal is fed back directly into the mag- netic circuit of the antenna tank. This negative feedback reduces the losses produced in the magnetic circuit due to the presence of nearby conductors. As a result of this reduction, an increase in the antenna sensitivity and a decrease in the cross-feed from other nearby antenna is produced.

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