中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Grant
US08125298B2 Acoustic wave filter, duplexer using the acoustic wave filter, and communication apparatus using the duplexer 有权
声波滤波器，使用声波滤波器的双工器，以及使用双工器的通信设备

Acoustic wave filter, duplexer using the acoustic wave filter, and communication apparatus using the duplexer
Abstract:
An acoustic wave filter having excellent steepness is provided without adding any exterior components or any new manufacturing steps. A plurality of filters (10-1) each having a first resonator (2a-1) placed in a serial arm and having a resonance frequency frs and an anti-resonance frequency fas, and a second resonator (4a-1) placed in a parallel arm and having a resonance frequency frp and an anti-resonance frequency fap are provided on a same substrate, where the resonance frequency frs of the first resonator is higher than the resonance frequency frp of the second resonator; the anti-resonance frequency fas of the first resonator is higher than the anti-resonance frequency fap of the second resonator; and the filters (10-1) are connected in multiple stages. At least one of the filters (10-1) connected in multiple stages has a third resonator (6-1) having a resonance frequency frp and an anti-resonance frequency fap. The third resonator (6-1) is formed on the substrate and connected to the serial arm in parallel with respect to the first resonator (2a-1).
Abstract(Chinese):

提供了具有优异陡度的声波滤波器，而不增加任何外部部件或任何新的制造步骤。 多个滤波器（10-1），每个滤波器（10-1）具有放置在串联臂中的第一谐振器（2a-1），并具有谐振频率frs和反共振频率fas，以及放置在 平行臂并具有共振频率frp和反共振频率fap设​​置在同一基板上，其中第一谐振器的谐振频率frs高于第二谐振器的谐振频率frp; 第一谐振器的反共振频率fas高于第二谐振器的反共振频率fap; 并且过滤器（10-1）分成多个阶段连接。 多级连接的滤波器（10-1）中的至少一个具有谐振频率frp和反共振频率fap的第三谐振器（6-1）。 第三谐振器（6-1）形成在基板上并相对于第一谐振器（2a-1）并联连接到串联臂。

Public/Granted literature
Information query
Espacenet
Patent Agency Ranking
0/0