2014 Publications

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The year 2014 brought about significant advancements in the complexity and functional breadth of micromechanical signal processors. It specifically introduced the largest micromechanical circuit to date (using 206 elements) that shapes the frequency spectra of communication signals, as well as circuits that increase Q, switch charge and voltage, react to optical inputs, and divide frequency, all mechanically. The advancements of this year set the stage for the first practical all-mechanical receivers to come in subsequent years. The year culminated with demonstration of a super-regenerative transceiver that takes advantage of RF channel-selection by a multi-port wine-glass disk to clean up signals reaching its regenerative oscillator, providing superior blocker immunity versus previous renditions and showcasing the advantages of RF channel-selection. This transceiver became the product focus of MuMec. Finally, 2014 introduced the negative capacitance electrical equivalent circuit for capacitive-gap transduced micromechanical resonators and in the process elucidated the impact of loading on the ports of these devices.

R. A. Schneider and C. T.-C. Nguyen, “On/off switchable high-Q capacitive-piezoelectric AlN resonators,” Tech. Digest, 2014 IEEE Int. Micro Electro Mechanical Systems Conference, San Francisco, California, Jan. 26-30, 2014, pp. 1265-1268.

Y. Lin, R. Liu, W.-C. Li, and C. T.-C. Nguyen, “Polycide contact interface to suppress squegging in micromechanical resoswitches,” Tech. Digest, 2014 IEEE Int. Micro Electro Mechanical Systems Conference, San Francisco, California, Jan. 26-30, 2014, pp. 1273-1276.

T. Beyazoglu, T. O. Rocheleau, K. E. Grutter, A. J. Grine, M. C. Wu, and C. T.-C. Nguyen, “A multi-material Q-boosted low phase noise optomechanical oscillator,” Tech. Digest, 2014 IEEE Int. Micro Electro Mechanical Systems Conference, San Francisco, California, Jan. 26-30, 2014, pp. 1193-1196.

T. O. Rocheleau, R. Liu, J. N. Nilchi, T. L. Naing, and C. T.-C. Nguyen, “A micromechanical parametric oscillator for frequency division and phase noise reduction,” Tech. Digest, 2014 IEEE Int. Micro Electro Mechanical Systems Conference, San Francisco, California, Jan. 26-30, 2014, pp. 210-213.

H. G. Barrow and C. T.-C. Nguyen, “A protocol for automated passband tuning of high-order microelectromechanical filters,” Proceedings, IEEE Int. Frequency Control Symp., Taipei, Taiwan, May 19-22, 2014, pp. 607-611.

T. L. Naing, J. N. Nilchi, R. Liu, T. O. Rocheleau, and C. T.-C. Nguyen, “Active Q-control for improved insertion loss micromechanical filters,” Proceedings, IEEE Int. Frequency Control Symp., Taipei, Taiwan, May 19-22, 2014, pp. 612-617.

M Akgul and C. T.-C. Nguyen, “A passband-corrected high rejection channel-select micromechanical disk filter,” Proceedings, IEEE Int. Frequency Control Symp., Taipei, Taiwan, May 19-22, 2014, pp. 601-606.

M. Akgul, L. Wu, Z. Ren, and C. T.-C. Nguyen, “A negative-capacitance equivalent circuit model for parallel-plate capacitive-gap-transduced micromechanical resonators,” IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vo. 61, no. 5, pp.849-869, May 2014 (21 pages).

T. O. Rocheleau, T. L. Naing, J. N. Nilchi, and C. T.-C. Nguyen, “A MEMS-based tunable RF channel-selecting super-regenerative transceiver for wireless sensor nodes,” Tech. Digest, 2014 Hilton Head MEMS Conf., Hilton Head, SC, June 8-12, 2014, pp. 83-86.