| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for driving and measuring at a plurality of frequencies for a spherical surface acoustic wave (SAW) element, capable of driving and measuring at the plurality of frequencies in spite of a configuration using a single driving system circuit/measuring system circuit. SOLUTION: According to a configuration for driving and measuring a spherical SAW element at a plurality of frequencies of the present invention, a multiplication circuit is effectively utilized to create a plurality of frequencies from a single frequency and a propagation change in the plurality of frequencies can be observed by measuring a phase difference/strength for each frequency. Therefore, driving and measuring can be performed at the plurality of frequencies in spite of a single driving system circuit/measuring system circuit. COPYRIGHT: (C)2009,JPO&INPIT
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