Micromechanical mixer-filters ("mixlers")
Ark-Chew Wong; Nguyen, C.T.-C.
Microelectromechanical Systems, Journal of
Volume 13, Issue 1, Feb. 2004 Page(s): 100 - 112
Digital Object Identifier   10.1109/JMEMS.2003.823218
Summary: 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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