MEMS switching of contour-mode aluminum nitride resonators for switchable and reconfigurable radio frequency filters

Christopher D. Nordquist, Darren W. Branch, Tammy Pluym, Sukwon Choi, Janet H. Nguyen, Alejandro Grine, Christopher W. Dyck, Sean M. Scott, Molly N. Sing, Roy H. Olsson

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Switching of transducer coupling in aluminum nitride contour-mode resonators provides an enabling technology for future tunable and reconfigurable filters for multi-function RF systems. By using microelectromechanical capacitive switches to realize the transducer electrode fingers, coupling between the metal electrode finger and the piezoelectric material is modulated to change the response of the device. On/off switched width extensional resonators with an area of <0.2 mm2 demonstrate a Q of 2000, K 2 of 0.72, and >24 dB switching ratio at a resonator center frequency of 635 MHz. Other device examples include a 63 MHz resonator with switchable impedance and a 470 MHz resonator with 127 kHz of fine center frequency tuning accomplished by mass loading of the resonator with the MEMS switches.

Original languageEnglish (US)
Article number104001
JournalJournal of Micromechanics and Microengineering
Volume26
Issue number10
DOIs
StatePublished - Aug 31 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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