Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2006-11-09
2010-11-30
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S197000
Reexamination Certificate
active
07843283
ABSTRACT:
An array of micromechanical oscillators have different resonant frequencies based on their geometries. In one embodiment, a micromechanical oscillator has a resonant frequency defined by an effective spring constant that is modified by application of heat. In one embodiment, the oscillator is disc of material supported by a pillar of much smaller diameter than the disc. The periphery of the disc is heated to modify the resonant frequency (or equivalently the spring constant or stiffness) of the disc. Continuous control of the output phase and frequency may be achieved when the oscillator becomes synchronized with an imposed sinusoidal force of close frequency. The oscillator frequency can be detuned to produce an easily controlled phase differential between the injected signal and the oscillator feedback. A phased array radar may be produced using independent phase controllable oscillators.
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Aubin Keith
Craighead Harold G.
Parpia Jeevak M.
Reichenbach Robert B.
Zalalutdinov Maxim
Cornell Research Foundation Inc.
Schwegman Lundberg & Woessner, P.A.
Takaoka Dean O
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