换能器加权的均匀槽深沟槽反射栅脉冲压缩滤波器

UNIFOKM GROOVE-DEPTH RAC BY USING TRANSDUCER WEIGHTING

摘要: 本文研究了均匀槽深的沟槽反射栅脉冲压缩滤波器的幅度加权新方法——换能器加权。此时,在沟槽反射栅脉冲压缩滤波器中的输入和输出换能器构成一个用于加权目的的横向滤波器。
此外,我们也讨论了槽宽加权,它可以作为一种加权辅助方法。
利用上述新方法,研制了两种器件,旁瓣抑制分别达到 31dB和32dB。这是在没有采取金属条相位补偿措施下获得的,此结果还是较满意的。

Abstract: A new amplitude weighting method, transducer weighting for the uniform groove-depth RAC is proposed in this paper. The weighted input and output transducers form a weighting transversal filter. In addition, the groove-width weighting can also be used as an auxiliary.
On using the new methods, two uniform groove-depth RAC’s were designed and fabricated. The side-lobe suppressions achieved were 31 dB and 32 dB respectively. The results are considered satisfactory because phase compensation by metal strip was not applied.