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Attenuation of spurious responses in electromechanical filters

United States Patent

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9,941,857
April 10, 2018
View the Complete Patent at the US Patent & Trademark Office
A spur cancelling, electromechanical filter includes a first resonator having a first resonant frequency and one or more first spurious responses, and it also includes, electrically connected to the first resonator, a second resonator having a second resonant frequency and one or more second spurious responses. The first and second resonant frequencies are approximately identical, but the first resonator is physically non-identical to the second resonator. The difference between the resonators makes the respective spurious responses different. This allows for filters constructed from a cascade of these resonators to exhibit reduced spurious responses.
15/072,611
March 17, 2016
1/1;
H03H 9/02 (20060101); H03H 9/54 (20060101); H03H 9/46 (20060101); H03H 9/64 (20060101);
;333/133,186,187,193-196
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract no. DE-AC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.