Interdigital transduction structure, resonator, resonator manufacturing method and filter

Abstract

The invention discloses an interdigital transduction structure, a resonator, a resonator manufacturing method and a filter, and relates to the field of resonators, the interdigital transduction structure comprises a first busbar and a second busbar which are arranged in parallel, the first busbar is provided with a plurality of first electrodes, the second busbar is provided with a plurality of second electrodes, and the first electrodes and the second electrodes are arranged in parallel. The plurality of first electrodes and the plurality of second electrodes are oppositely arranged in a middle area between the first busbar and the second busbar at intervals; the middle area comprises an interdigital area and a monopole area which does not belong to the interdigital area; the first electrodes and the second electrodes in the monopole area are connected through a plurality of metal strips, and metal thickening layers are arranged at the electrode ends of the electrodes and the corresponding electrodes. The first electrodes and the second electrodes in the monopole area are connected through the metal strips, the metal thickening layers are arranged, the sound velocity of the monopole area and the sound velocity of the interdigital area are different through the structure, and therefore transverse mode ripples are effectively restrained.

Description

technical field [0001] The invention relates to the technical field of resonators, in particular to an interdigital transducer structure, a resonator, a manufacturing method of the resonator and a filter. Background technique [0002] With the development of communication technology from 2G to 5G, the number of communication frequency bands has gradually increased. In order to improve the compatibility of smartphones with different communication systems, the amount of filters required by 5G smartphones will increase significantly, driving the large-scale growth of the filter market. The radio frequency filter currently widely used in wireless communication terminals is the SAW filter, which is responsible for filtering the radio frequency signals of the receiving and transmitting channels, and outputs signals of specific frequencies among the various input radio frequency signals. At the same time, with the continuous development of mobile communication technology and the m...

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide an interdigital transducer structure, a resonator, a resonator manufacturing method and a filter, aiming to solve the problems of the conventional surface acoustic wave resonator and radio frequency filter in the prior art. Technical problem with strong transverse mode moiré

Images