MEMS filter with voltage tunable center frequency and bandwidth
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United States of America Patent
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Feb 7, 2012
Grant Date -
Dec 31, 2009
app pub date -
May 2, 2007
filing date -
May 2, 2006
priority date (Note) -
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Abstract
A tunable MEMS filter is disclosed, having a substrate with first and second isolated substrate areas. First and second anchor points are coupled to the substrate. A base is coupled to the first and second anchor points by first and second coupling beams, respectively. A dielectric layer is coupled to the base. An input conductor is coupled to the at least one dielectric layer. An output conductor is coupled to the at least one dielectric layer.A method of tuning a center frequency and a bandwidth of a MEMS resonator filter is also disclosed. A first bias voltage is adjusted between a base layer and input and output conductor layers. A second bias voltage is adjusted between the base layer and isolated substrate areas. The center frequency and the bandwidth are determined until the adjustments to the bias voltages provide a desired center frequency and a desired bandwidth.
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