摘要
介绍了一种无指间反射的分组单指换能器结构,它具有分裂指相同的TTS效果,而工艺难度得以降低。首次将变迹加权用于该结构,制作了高带外抑制的滤波器,并给出了试验结果。中心频率418MHz,相对带宽2‰,阻带抑制优于38dB,插入损耗18dB。
This paper presents a single-finger grouping structure of transducer without interfinger renection, which has the same TTS effectiveness as that of split-finger and reduces the process difficulty. The apodized weighting is first applied on this kind of transducer structure in ourwork, and a SAW filter with high out-of-band rejection is produced. The experimental results areas followes:center frequency=418 MHz, relative bandwidth=2 ‰, out-of-band>38 dB, insertionloss=18 dB.
出处
《压电与声光》
CSCD
北大核心
1996年第2期73-75,共3页
Piezoelectrics & Acoustooptics