An interdigital transducer having stepped transmutation structure

• Main Authors: DONG YUANDAN, WANG GANG, AN JIANGUANG, YANG TAO
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2020
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

The utility model discloses an interdigital transducer with a step gradient structure, which comprises a first finger strip and a second finger strip, the first finger strip comprises at least one first step gradient structure, and the second finger strip comprises at least one second step gradient structure; each first step gradient structure comprises a first bus bar and a plurality of finger bars arranged on the same side of the first bus bar, and the length of the finger bar in each step gradient structure is gradually reduced from the middle to the two ends; and the finger strips in the second finger strip are arranged in a cavity between two adjacent finger strips in the first finger strip to form the interdigital transducer. According to the utility model, the lengths of the fingerstrips of the interdigital transducer are gradually reduced from the middle to the two sides, so that the leakage wave of the sound wave in the transmission direction is reduced, the Q value is improved, and the loss of the S