| 摘要 |
A SAW filter including a piezoelectric substrate 11 , an input electrode 12 and an output electrode 13 each representing an interdigital electrode disposed on the piezoelectric substrate 11 and two reflectors 14 and 14 disposed on the piezoelectric substrate 11 in an arrangement sandwiching both the input electrode 12 and the output electrode 13 between the reflectors. Each of the electrodes 12 and 13 include a plurality of electrode fingers 121, 122 and 131, 132 respectively. The electrode fingers are partially bent at an angle and include at least two linear sections which are spaced at a distance of lambda/2 from one another in the propagating direction of the SAWs. The electrode fingers 131 and 132 of the output electrode 13 and electrode fingers 141 of the reflector 14 are structured similarly to the electrode fingers 121 and 122 of the input electrode 12.
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