发明名称 |
Microwave acoustic wave filters |
摘要 |
An acoustic microwave filter comprises an input and an output, and a plurality of acoustic resonators coupled between the input and the output. The difference between the lowest resonant frequency and the highest resonant frequency of a plurality of resonators in the filter is at least 1.25 times the frequency separation of the resonator with the highest resonant frequency in the plurality of resonators. Another acoustic microwave filter comprises an input and an output, and a plurality of acoustic resonators coupled between the input and the output to form a passband. The frequency difference between a local minimum or a local maximum of a return loss magnitude of the acoustic microwave filter and the edge of the passband is at least once the frequency separation of the resonator with the highest resonant frequency. |
申请公布号 |
US9325294(B2) |
申请公布日期 |
2016.04.26 |
申请号 |
US201313934051 |
申请日期 |
2013.07.02 |
申请人 |
RESONANT INC. |
发明人 |
Silver Richard N.;Raihn Kurt F.;Fenzi Neal O.;Hammond Robert B. |
分类号 |
H03H9/64;H03H9/46;H03H9/54;H03H9/56;H03H9/60;H03H9/25;G06F17/50 |
主分类号 |
H03H9/64 |
代理机构 |
Vista IP Law Group LLP |
代理人 |
Vista IP Law Group LLP |
主权项 |
1. An acoustic microwave filter, comprising:
an input and an output; and a plurality of acoustic resonators coupled between the input and the output to form a passband, wherein the frequency difference between the edge of the passband and a frequency at which a local minimum of a return loss magnitude and a local maxima of an insertion loss magnitude of the acoustic microwave filter coincide to within less than five percent of the frequency separation of the resonator with the highest resonant frequency is at least once the frequency separation of the resonator with the highest resonant frequency. |
地址 |
Santa Barbara CA US |