Wideband tunable combiner system
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United States of America Patent
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May 30, 2017
Grant Date -
Feb 16, 2017
app pub date -
Aug 12, 2015
filing date -
Aug 12, 2015
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Abstract
A wideband tunable combiner system for a dual frequency diversity transmitter is provided that includes a tunable capacitance network. Incoherent RF signals with the same audio signal may be combined with the system into a combined RF signal for transmission on an antenna. The tunable capacitance network, in conjunction with a combiner and a band pass filter, may optimize the isolation between the incoherent RF signals and reduce intermodulation, while maintaining a wide operating bandwidth. The capacitance value of the tunable capacitance network may be selected based on the frequencies of the incoherent RF signals, RF spectrum information, or antenna loading data. An RF transmitter including the tunable combiner system may have improved spectral efficiency and performance and take advantage of available spectrum.
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