Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2009-04-30
2011-11-08
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S248000
Reexamination Certificate
active
08054145
ABSTRACT:
Phononic crystal wave structures and methods of making same are discussed in this application. According to some embodiments, an acoustic structure can generally comprise a phononic crystal slab configured as a micro
ano-acoustic wave medium. The phononic crystal slab can define an exterior surface that bounds an interior volume, and the phononic crystal slab can be sized and shaped to contain acoustic waves within the interior volume of the phononic crystal slab. The phononic crystal slab can comprise at least one defect portion. The defect portion can affect periodicity characteristics of the phononic crystal slab. The defect portion can be shaped and arranged to enable confinement and manipulation of acoustic waves through the defect portion(s) of phononic crystal slab. Other aspects, features, and embodiments are also claimed and described.
REFERENCES:
patent: 4150346 (1979-04-01), Auld
patent: 6909221 (2005-06-01), Ayazi et al.
patent: 7057476 (2006-06-01), Hwu
patent: 7292740 (2007-11-01), Barker et al.
patent: 7733198 (2010-06-01), Olsson et al.
patent: 7836566 (2010-11-01), Olsson et al.
patent: 7859350 (2010-12-01), Schwindt et al.
patent: 2008/0283765 (2008-11-01), Hyde et al.
patent: 2008100901 (2008-08-01), None
Qiu et al., Mode-selecting acoustic filter by using resonant tunneling of two-dimensional double phononic crystals, Aug. 2005, Applied Physics 87, 3 pages.
Luk et al., Photonic and phononic crystal research at Sandia, Apr. 2007, QMPH, 26 pages.
Luk et al., Photonic and phononic crystal research at Sandia, Apr. 2007, QMPH, 4 pages.
Mohammadi, S., et al., Complete Phononic Bandgaps and Bandgap Maps in Two-Dimensional Silicon Phononic Crystal Plates, Electronics Letters, vol. 43, No. 16 (Aug. 7, 2007).
Sigalas, M.M., et al., Elastic and Acoustic Wave Band Structure, Journal of Sound and Vibration (1992) 158(2), 377-382.
Kushwaha, M.S., et al., Acousting Band Structure of Periodic Elastic Composites, Physical Review Letters, vol. 71, No. 13, pp. 2022-2025, Sep. 27, 1993.
Khelif, A., et al., Complete Band Gaps in Two-Dimensional Phononic Crystal Slabs, Physical Review E, 74, 046610-1-046610-4, Oct. 17, 2006.
Zhang, X., et al., Evidence of surface acoustic wave band gaps in the phononic crystals created on thin plates, Applied Physics Letters 88, 041911-1-041911-3, Jan. 25, 2006.
Tanaka, Y., Acoustic stop bands of surface and bulk modes in two-dimensional phononic lattices consisting of aluminum and a polymer, Physical Review B, vol. 60, No. 19, pp. 13 294-13 297, Nov. 15, 1999.
Meseguer, F., et al., Two-Dimensional Elastic Bandgap Crystal to Attenuate Surface Waves, Journal of Lightwave Technology, vol. 17, No. 11, pp. 2196-2201, Nov. 1999.
Benchabane, S., et al., Evidence for complete surface wave band gap in a piezoelectric phononic crystal, Physical Review E 73, 065601-1-065601-4, Jun. 9, 2006.
Sun, J., et al., Propagation of surface acoustic waves through sharply bent two-dimensional phononic crystal waveguides using a finite-difference time-domain method, Physical Review B 74, 174305-1-174305-7, Nov. 30, 2006.
Khelif, A., et al., Waveguiding inside the complete band gap of a phononic crystal slab, Physical Review E 76, 056601-1 056601-6, Nov. 8, 2007.
Vasseur, J.O., et al., Waveguiding in two-dimensional piezoelectric phononic crystal plates, Journal of Applied Physics 101, 114904-1-114904-6, Jun. 5, 2007.
Olsson, III, Roy, et al., Microfabricated VHF acoustic crystals and waveguides, Sensors and Actuators A 145-146, pp. 87-93, Nov. 12, 2007.
El-Kady, I., et al., Phononic band-gap crystals for radio frequency communications, Applied Physics Letters 92, 233504-1-233504-3, Jun. 10, 2008.
Chang, LL., et al., Resonant Tunneling in Semiconductor Double Barriers, Applied Physics Letters, vol. 24, No. 12, pp. 593-595, Jun. 15, 1974.
Gorishnyy, T., et al., Phononic crystals are novel materials that offer exceptional control over phonons, sound and other mechanical waves, physicsworld.com, published Dec. 1, 2005 (accessed Apr. 15, 2005).
Vasseur, J., et al., Waveguiding in supported phononic crystal plates, Journal of Physics: Conference Series 92 (2007) 012111, pp, 1-4.
Adibi Ali
Eftekhar Ali Ashgar
Mohammadi Saeed
Georgia Tech Research Corporation
Schneider, Esq. Ryan A.
Takaoka Dean
Troutman Sanders LLP
Weeks, Esq. Dustin B.
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