RESONATOR AND PREPARATION METHOD THEREFOR, AND FILTER

WIPO Patent Application WO/2023/082186

A1

The embodiments of the present application relate to the technical field of wireless communications. Provided are a resonator and a preparation method therefor, and a filter, which can improve a quality factor of a resonator by means of reducing the propagation speed of a transverse sound wave. The resonator comprises a piezoelectric substrate; and an input bus bar, an output bus bar, a plurality of first interdigital electrodes electrically connected to the input bus bar and a plurality of second interdigital electrodes electrically connected to the output bus bar, which are all arranged on an upper surface of the piezoelectric substrate. The resonator comprises an input bus area, an output bus area and a transduction area. The input bus bar is located in the input bus area, the output bus bar is located in the output bus area, and the plurality of first interdigital electrodes and the plurality of second interdigital electrodes are located in the transduction area. A part of the upper surface of the piezoelectric substrate that is located in the transduction area is not on the same plane as parts thereof that are located in the input bus area and the output bus area.

HUANG YULIN (CN)
ZHANG BENFENG (CN)
LI XINYI (CN)
QIN XUDONG (CN)
GAO ZONGZHI (CN)

PCT/CN2021/130381

May 19, 2023

November 12, 2021

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HUAWEI TECH CO LTD (CN)

H03H9/02; H03H9/145; H03H9/25; H03H9/64

JP2008118576A	2008-05-22
US20170155373A1	2017-06-01
CN110572137A	2019-12-13
CN108768333A	2018-11-06
JP2012099925A	2012-05-24

BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)

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