Piezoelectric resonator, method for adjusting frequency thereof and communication apparatus comprising said resonator
A piezoelectric resonator and resonant frequency technology, applied in piezoelectric devices/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve difficult applications, automation difficulties, performance changes, etc. question
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[0047] See figure 1 with figure 2 The piezoelectric resonator 10 includes, for example, a base body 12 in the form of a substantially rectangular block. The base 12 includes, for example, about 20 laminated piezoelectric material layers 12a made of piezoelectric ceramics. These piezoelectric material layers 12a are formed into a uniform size. These piezoelectric material layers 12a are polarized along the longitudinal direction of the base body 12, so that the polarization directions of each pair of adjacent piezoelectric material layers 12a are opposite to each other, such as figure 1 As shown by the arrow in. However, at the opposite end, the piezoelectric material layer 12a is preferably not polarized. In addition, at the opposite end, the piezoelectric material layer 12a may also be polarized.
[0048] The internal electrode 14 is provided between the piezoelectric layers 12 a of the base body 12. Therefore, the internal electrodes are arranged to be substantially perpendic...
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