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陶瓷濾波器的電壓頻率怎么計算?

發表時間:2021-04-09 17:33【 閱讀量:-查看手機網址
掃一掃!陶瓷濾波器的電壓頻率怎么計算?掃一掃!

  壓電器件的陶瓷濾波器的電壓頻率怎么計算?


  以一個或多個復壓電陶瓷振子(被制覆電極的陶瓷片)通過金屬支架固定或用引線焊接,再封入外殼即構成陶瓷濾波器。例如將兩個陶瓷振子按a作L型連接,可組成雙振子陶瓷濾波器。調節串聯振子1的諧振頻率fr1,使之等于并聯振子2的反諧振頻率fa2,于是濾波器的衰耗特性就1b。當信號頻率位于fr1(=fa2)附近時,濾波器導通;當信號頻率遠離fr1時,濾波器阻斷。實際上雙振子組成的濾波器特性較差,如果將這個結構看作一節,并組成多節濾波器,則可得到滿意的濾波特性。壓電器件陶瓷濾波器的分類如表2。陶瓷材料的機電耦合系數大,適于作寬帶濾波器。其相對帶寬約為0.3%~20%,阻帶衰減可達60分貝以上。

此文關鍵字:陶瓷濾波器
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