Tunable capacitor based on polymer-dispersed liquid crystal for power harvesting microsystems

IEEE Transactions on Electron Devices

Volumn 55, Issue 10, 2008, Pages 2568-2573

  Shih, Wen Pin ^a   Chung, Sheng Yuan ^b   Chen, Yu Yin ^b   Wu, Wen Jong ^a   Chang, Pei Zen ^b  

^a NATIONAL TAIWAN UNIVERSITY   (Taiwan)

^b NATIONAL TAIWAN UNIVERSITY   (Taiwan)

Author keywords

Liquid crystal; Power harvesting; Tunable capacitor; Tuning ratio

Indexed keywords

ABS RESINS; CAPACITANCE; CAPACITORS; CHEMICAL SENSORS; COMPOSITE MICROMECHANICS; ELECTRIC EQUIPMENT; HARVESTING; LATTICE VIBRATIONS; LIGHT SOURCES; LIQUID CRYSTAL POLYMERS; LIQUID CRYSTALS; MICROSYSTEMS; OPTICAL PROPERTIES; PIEZOELECTRICITY; POLYMERS; POWDERS; RESONANCE; VIBRATIONS (MECHANICAL);

LIQUID CRYSTAL; POWER HARVESTING; TUNABLE CAPACITOR; TUNING RATIO;

DIELECTRIC DEVICES;

EID: 53649087257     PISSN: 00189383     EISSN: None     Source Type: Journal    
DOI: 10.1109/TED.2008.2003226     Document Type: Article

References (28)

1. W.-J. Wu, Y.-Y. Chen, B.-S. Lee, J.-J. He, and Y.-T. Peng, "Tunable resonant frequency power harvesting devices," in Proc. SPIE Smart Struct. Mater., San Diego, CA, 2006, pp. 55-62.
2. G. K. Ottman, "Adaptive piezoelectric energy harvesting circuit for wireless remote power supply," IEEE Trans. Power Electron., vol. 17, no. 5, pp. 669-676, Sep. 2002.
3. N. G. Elvin, A. A. Elvin, and M. Spector, "A self-powered mechanical strain energy sensor," Smart Mater. Struct., vol. 10, no. 2, pp. 293-299, Apr. 2001.
4. J. Ajitsaria, S. Y. Choe, D. Shen, and D. J. Kim, "Modeling and analysis of a bimorph piezoelectric cantilever beam for voltage generation," Smart Mater. Struct., vol. 16, no. 2, pp. 447-454, Apr. 2007.
5. M. J. Guan and W. H. Liao, "On the efficiencies of piezoelectric energy harvesting circuits towards storage device voltages," Smart Mater. Struct., vol. 16, no. 2, pp. 498-505, Apr. 2007.
6. R. Fletcher, "Force transduction materials for human-technology interfaces," IBM Syst. J., vol. 35, no. 3/4, pp. 630-63 8, Sep.-Dec. 1996.
7. T. Starner, "Human-powered wearable computing," IBM Syst. J., vol. 35, no. 3/4, pp. 35 267-35 294, 1996.
8. A. Badel, D. Guyomar, E. Lefeuvre, and C. Richard, "Efficiency enhancement of a piezoelectric energy harvesting device in pulsed operation by synchronous charge inversion," J. Intell. Mater. Syst. Struct., vol. 16, no. 10, pp. 889-901, 2005.
9. N. S. Shenck and J. A. Paradiso, "Energy scavenging with shoe-mounted piezoelectrics," IEEE Micro, vol. 21, no. 3, pp. 30-42, May/Jun. 2001.
10. S.-Y. Chung, Y.-Y. Chen, W.-J. Wu, W.-P. Shih, and P.-Z. Chang, "Tunable capacitor based on polymer-dispersed liquid crystal for optimum micro-power harvesting," in Proc. 14th IEEE Int. Conf. Solid-State Sens., Actuators Microsyst., Lyon, France, 2007, pp. 137-140.
11. J. Chen, J. Zou, C. Liu, J. E. Schutt-Aine, and S.-M. K. Schunt-Aine, "Design and modeling of a micromachined high-Q tunable capacitor with large tuning range and a vertical planar spiral inductor," IEEE Trans. Electron Devices, vol. 50, no. 3, pp. 730-739, Mar. 2003.
12. A. Dec and K. Suyama, "Micromachined electro-mechanically tunable capacitors and their applications to RF ICs," IEEE Trans. Microw. Theory Tech., vol. 46, no. 12, pp. 2587-2596, Dec. 1998.
13. C. L. Goldsmith, A. Malczewski, Z. J. Yao, S. Chen, J. Ehmke, and Z. D. H. Hin, "RF MEMS variable capacitors for tunable filters," Int. J. RF Microw. Comput.-Aided Eng., vol. 9, pp. 362-374, 1999.
14. J. W. Doane, N. A. Vaz, B.-G. Wu, and S. umer, "Field controlled light scattering from nematic microdroplets," Appl. Phys. Lett., vol. 48, no. 4, pp. 269-271, Jan. 1986.
15. C. A. Chang, C. C. Cheng, and J. A. Yeh, "Analysis and modeling of liquid-crystal tunable capacitors," IEEE Trans. Electron Devices, vol. 53, no. 7, pp. 1675-1682, Jul. 2006.
16. W. Korner, H. Scheller, A. Beck, and J. Fricke, "PDLC films for control of light transmission," J. Phys. D, Appl. Phys., vol. 27, no. 10, pp. 2145-2151, Oct. 1994.
17. J.-J. Wu and C.-M. Wang, "Electro-optical properties of aligned polymer dispersed liquid crystal films," Phys. Lett. A, vol. 230, no. 1, pp. 149-154, Jul. 1997.
18. Y. Utsumi, T. Kamei, K. Saito, and H. Moritake, "Increasing the speed of microstrip-line-type polymer-dispersed liquid-crystal loaded variable phase shifter," IEEE Trans. Microw. Theory Tech., vol. 53, no. 11, pp. 3345-3353, Nov. 2005.
19. T. Kamei, Y. Utsumi, H. Moritake, K. Toda, and H. Suzuki, "Measurements of the dielectric properties of nematic liquid crystal at 10 kHz to 40 GHz and application to a variable delay line," Electron. Commun. Jpn., vol. 86, no. 8, pp. 49-60, Jul. 2003.
20. Y. Utsumi, T. Kamei, and R. Naito, "Measurements of effective dielectric permittivity of microstrip-line-type liquid crystal devices using inductive coupled ring resonator," Electron. Lett., vol. 39, no. 11, pp. 849-850, May 2003.
21. R. Nozaki, T. K. Bose, and S. Yagihara, "Dielectric relaxation of a reentrant nematic-liquid-crystal mixture by time-domain reflectometry," Phys. Rev. A, Gen. Phys., vol. 46, no. 12, pp. 7733-7737, Dec. 1992.
22. J. Jadzyn, G. Czechowski, M. Mucha, and E. Nastal, "Dielectric relaxation in polymer dispersed nematic liquid crystal films," Liq. Cryst., vol. 26, no. 3, pp. 453-456, Mar. 1999.
23. H. Mada and K. Osajima, "Time response of a nematic liquid-crystal cell in a switched dc electric field," J. Appl. Phys., vol. 60, no. 9, pp. 3111-3113, Nov. 1986.
24. M. L. Gasperi, "Life prediction modeling of bus capacitors in AC variable-frequency drives," IEEE Trans. Ind. Appl., vol. 41, no. 6, pp. 1430-1435, Nov./Dec. 2005.
25. N. Cramer, E. Philofsky, L. Kammerdiner, and T. S. Kalkur, "Microwave measurement and modeling of capacitors with tunable dielectric constants," in Proc. IEEE MTT-S Dig., vol. 1, pp. 269-272.
26. H. C. Nathanson, W. E. Newell, R. A. Wickstrom, and J. R. Davis, Jr., "The resonant gate transistor," IEEE Trans. Electron Devices, vol. ED-14, no. 3, pp. 117-133, Mar. 1967.
27. G. N. Nielson and G. Barbastathis, "Dynamic pull-in of parallel-plate and torsional electrostatic MEMS actuators," J. Microelectromech. Syst., vol. 15, no. 4, pp. 811-821, Aug. 2006.
28. Y. Nemirovsky and O. Bochobza-Degani, "A methodology and model for the pull-in parameters of electrostatic actuators," J. Microelectromech. Syst., vol. 10, no. 4, pp. 601-615, Dec. 2001.