Surface acoustic wave broadband band elimination filter

• Main Authors: LI HUALIN, MA JINYI, LENG JUNLIN, CHEN YEN-KUANG, DONG JIAHE, CHEN ZHENGLIN
• Format: Patent
• Language: Chinese; English
• Published: 05.08.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

The invention belongs to the technical field of filters, and particularly relates to a surface acoustic wave broadband band elimination filter. The filter comprises at least two surface acoustic wave resonators connected in series, at least two surface acoustic wave resonators connected in parallel and at least one spiral electrode structure, one end of the parallel surface acoustic wave resonator is connected between the two serial surface acoustic wave resonators, and the other end of the parallel surface acoustic wave resonator is grounded; one end of the spiral electrode structure is connected between the two serial surface acoustic wave resonators, and the other end of the spiral electrode structure is grounded; according to the surface acoustic wave band elimination filter, the relative bandwidth of the surface acoustic wave band elimination filter is improved, broadband range noise signals are well suppressed, the performance of the surface acoustic wave band elimination filter is improved, and the req