| Abstract: | 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. |