期刊
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
卷 13, 期 1, 页码 100-112出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JMEMS.2003.823218
关键词
bandpass filter; electromechanical coupling; IF; intermediate frequency; microelectromechanical systems (MENIS); microelectromechanical devices; mixer; quality factor; resonator; VHF
A device comprised of interlinked micromechanical resonators with capacitive mixer transducers has been demonstrated to perform both frequency translation (i.e., mixing) and highly selective low-loss filtering of applied electrical input signals. In particular, successful downconversion of a 200-MHz radio frequency (RF) signal down to a 37-MHz intermediate frequency (IF) and subsequent high-Q bandpass filtering at the IF are demonstrated using this single, passive, micromechanical device, all with less than 13 dB of combined mixing conversion and filter insertion loss. The mixer-filter (or mixler) RF-to-IF voltage transfer function is shown to depend upon a ratio of local oscillator amplitude and applied bias voltages.
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