Micromechanical Mixer+Filters
نویسندگان
چکیده
A device comprised of interlinked micromechanical resonators with capacitive mixer transducers has been demonstrated to perform both low-loss frequency translation (i.e. mixing) and highly selective filtering of applied electrical input signals. In particular, successful down-conversion of radio frequency (RF) signals from 40-200MHz and subsequent filtering at a 27MHz intermediate frequency (IF) with less than 15dB of combined mixing conversion and filter insertion loss is demonstrated using this single, micromechanical device. Mixing conversion gain/loss is shown to depend upon a ratio of local oscillator amplitude and applied bias voltages. A single-sideband (SSB) noise figure of 18dB is achieved.
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