Self-powered, piezo-surface acoustic wave apparatus and method
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United States of America Patent
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Oct 14, 2014
Issued Date -
N/A
app pub date -
Nov 10, 2009
filing date -
Nov 10, 2008
priority date (Note) -
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Abstract
An autonomous, self-powered device includes a radioisotope-powered current impulse generator including a spring assembly comprising a cantilever, and a piezoelectric-surface acoustic wave (P-SAW) structure connected in parallel to the current impulse generator. Positive charges are accumulated on an electrically isolated 63Ni thin film due to the continuous emission of β-particles (electrons), which are collected on the cantilever. The accumulated charge eventually pulls the cantilever into the radioisotope thin-film until electrical discharge occurs. The electrical discharge generates a transient magnetic and electrical field that can excite the RF modes of a cavity in which the electrical discharge occurs. A piezoelectric-SAW resonator is connected to the discharge assembly to control the RF frequency output. A method for generating a tuned RF signal includes inputting an energy pulse to a P-SAW resonator, exciting the resonant frequency thereof, and outputting an RF signal having a frequency tuned to the resonator frequency.
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International Classification(s)
- G08B:SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; A....
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- G21H:OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICA....
- H04Q:SELECTING
- G08C:TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL ....
- H02N:ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H03B:GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUEN....
- G01P:MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, D....
- H03H:IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONA....
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