AM/FM antenna performance in the presence of wide-band noise using tunable high-Q structures
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United States of America Patent
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Dec 6, 2016
Grant Date -
Nov 12, 2015
app pub date -
Apr 29, 2015
filing date -
May 7, 2014
priority date (Note) -
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Abstract
An AM/FM radio system for a vehicle that is selectively impedance matched to the particular tuned frequency of interest so that noise received by other frequencies does not affect the received signal. The radio system includes an HMI allowing a user to select an AM or FM radio station and a radio tuner responsive to a signal from the HMI identifying the selected radio station. The tuner tunes the radio system to the radio station, and provides a signal to the HMI identifying the radio station. The HMI places a message on a vehicle bus identifying the radio station that the radio tuner is tuned to. An antenna controller receives the message from the vehicle bus to selectively control an impedance matrix to provide impedance matching for the selected radio station frequency. The antenna controller also selectively tunes antenna radiating elements to the particular tuned frequency.
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