High-frequency surface-mounted acoustic surface transverse wave resonance filter with high out-of-band rejection

• Main Authors: ZHU MING, ZENG WU, MA JINYI, TIAN YARUI, RAN CHUANYUN, XU DONGHUI, ZHOU WEI, CHEN JUN, LIU JIXUE, OUYANG FENG, LI LIANG
• Format: Patent
• Language: English
• Published: 20.05.2015
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

The invention discloses a high-frequency surface-mounted acoustic surface transverse wave resonance filter with high out-of-band rejection. The high-frequency surface-mounted acoustic surface transverse wave resonance filter comprises a chip encapsulated in a shell. A first-level resonance filter body and a second-level resonance filter body are disposed on the chip. The two resonance filter bodies shares one piezoelectric quartz substrate. The output transducer signal output lead electrode of the first-level resonance filter body is connected with the input transducer signal input lead electrode of the second-level resonance filter body. The high-frequency surface-mounted acoustic surface transverse wave resonance filter has the advantages that the out-of-band rejection is increased greatly, out-of-band rejection performance is improved, and the out-of-band rejection requirements during high-frequency work are satisfied.