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.
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.
NAKASO NOBUTAKA
YANAGISAWA YASUYUKI
NOGUCHI KAZUHIRO
OKI TSUNERO
| JP2007019701A | 2007-01-25 | |||
| JP2006071482A | 2006-03-16 | |||
| JP2005159580A | 2005-06-16 | |||
| JP2002026688A | 2002-01-25 | |||
| JP2000059175A | 2000-02-25 | |||
| JPS632414A | 1988-01-07 |