Antenna diversity scheme employing band pass sampling and fast semiconductor switching
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United States of America Patent
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Feb 25, 2014
Grant Date -
Jul 5, 2012
app pub date -
Dec 1, 2011
filing date -
Jan 5, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A vehicle or other host station includes first and second antennas, a fast semiconductor switch, a switching controller, and an RF receiver. The controller toggles the switch at a calibrated switching rate to selectively and alternately connect the first antenna to one of the RF receiver and a load having a calibrated impedance value. The first antenna may be a parasitic element in any embodiment using the load. The semiconductor switch may be a CMOS device or a Gallium Arsenide semiconductor switch. A switching control method for use in a vehicle or other host station having the first antenna, the second antenna, and the RF receiver includes transmitting a switching signal from the controller to the switch, and toggling the switch at a calibrated switching rate in response to the switching signal to selectively and alternately connect the first antenna to one of the RF receiver and the load.
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