System and method for reducing search time and increasing search accuracy during interrogation of resonant devices
First Claim
1. A method of determining the resonant frequency of a resonant device, said method comprising the steps of:
- partitioning a first designated frequency range into at least two respective first search frequency ranges;
energizing the resonant device by transmitting one or more respective first RF pulses characterized by a first bandwidth in selected of the at least two respective first search frequency ranges;
monitoring the response of said resonant device to the one or more first RF pulses to determine if the amount of energy radiated by said resonant device exceeds a first predetermined threshold level; and
if the amount of energy radiated by said resonant device in response to the one or more first RF pulses transmitted in selected of the at least two respective first search frequency ranges does not exceed the first predetermined threshold level, repeating said partitioning, energizing and monitoring steps for additional respective search frequency ranges within the at least two respective first search frequency ranges until the amount of energy radiated by said resonant device in response to the one or more first RF pulses exceeds the predetermined threshold level.
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Accused Products
Abstract
Methods for determining the resonant frequency for interrogation of a resonant device include steps for generating and transmitting RF interrogation pulses of various bandwidths to energize one or more SAW resonator elements. Initial RF interrogation pulses have a relatively wide bandwidth, such that the general location of a resonant device'"'"'s resonant frequency can be expediently determined. Then, interrogation pulses having smaller bandwidth pulses can be transmitted near the determined general location of resonance to further narrow the location of resonance. In some emodiments, one or more initial interrogation pulses are transmitted in the center of or at an expected value within a range of operation of a resonant device. If the resonant frequency is not located at this initial location, then the range of operation is divided into halves (or other number of generally equal frequency range segments) and one or more interrogation pulses are transmitted at the center of each of the new search frequency range segments. This process of partitioning the search frequency range continues until the resonant frequency is located.
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Citations
20 Claims
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1. A method of determining the resonant frequency of a resonant device, said method comprising the steps of:
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partitioning a first designated frequency range into at least two respective first search frequency ranges; energizing the resonant device by transmitting one or more respective first RF pulses characterized by a first bandwidth in selected of the at least two respective first search frequency ranges; monitoring the response of said resonant device to the one or more first RF pulses to determine if the amount of energy radiated by said resonant device exceeds a first predetermined threshold level; and if the amount of energy radiated by said resonant device in response to the one or more first RF pulses transmitted in selected of the at least two respective first search frequency ranges does not exceed the first predetermined threshold level, repeating said partitioning, energizing and monitoring steps for additional respective search frequency ranges within the at least two respective first search frequency ranges until the amount of energy radiated by said resonant device in response to the one or more first RF pulses exceeds the predetermined threshold level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining an optimal interrogation frequency for a resonant device, said method comprising the steps of:
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transmitting one or more RF pulses characterized by a given bandwidth at a plurality of different frequencies within a given range of frequencies; obtaining an amplitude response measurement for the resonant device at each of the plurality of different frequencies; repeating said transmitting and obtaining steps for one or more subsequent iterations, wherein the RF pulses transmitted in each subsequent iteration are characterized by a bandwidth less than or equal to the bandwidth of the pulses in the preceding iteration, and wherein the plurality of different frequencies at which the one or more RF pulses are transmitted in each subsequent iteration are within a selected subset of the given range of frequencies from the preceding iteration. - View Dependent Claims (10, 11, 12, 13)
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14. A method of interrogating a resonant device, comprising:
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establishing one or more search frequency ranges; energizing the resonant device by transmitting one or more RF pulses at a selected frequency within selected of said one or more search frequency ranges; determining whether the response of the resonant device to the one or more RF pulses exceeds a first predetermined value; if the response of the resonant device does not exceed the predetermined value in said determining step, partitioning selected of the one or more search frequency ranges into at least two new search frequency ranges and repeating said energizing, determining and partitioning steps until the response of the resonant device exceeds the first predetermined value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification