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Volume 23 Issue 3
Aug.  2022
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HE Shitang, WANG Chenghao, XIA Shu, JIN Guohua. Design and performance of SAW low insertion loss filters (Ⅰ) single phase unidirectional transducer[J]. ACTA ACUSTICA, 1998, 23(3): 279-283. DOI: 10.15949/j.cnki.0371-0025.1998.03.013
Citation: HE Shitang, WANG Chenghao, XIA Shu, JIN Guohua. Design and performance of SAW low insertion loss filters (Ⅰ) single phase unidirectional transducer[J]. ACTA ACUSTICA, 1998, 23(3): 279-283. DOI: 10.15949/j.cnki.0371-0025.1998.03.013
shu

Design and performance of SAW low insertion loss filters (Ⅰ) single phase unidirectional transducer

  • Institute of Aconstics, The Chinese Academy of Sciences Beijing 100080

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  • PACS: 
    • 43.35  (Ultrasonics, quantum acoustics, and physical effects of sound)
  • Received Date: December 19, 1997
  • Available Online: August 01, 2022
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    • Abstract
  • The principle and the design method of EWC/SPUDT is presented.The relationship that directivity of sAW excited unidirectionally on Ewc/SPUDT depends on the phase of the reffective coefficient of the reflective strip is discussed.The measured frequency response of the IF filters for wireless communications and the filters for antenna duplexer of Chinese CT1 fabricated on ST-X Quartz,y112° LiTaO3 and Y128° LiNbO3 substrates are presented.Their insertion loss are 4.6 dB,3.5 dB and 3 dB with bandwidth 0.6%,0.75% and 1.4% respectively and out-of-band rejections more than 50 dB.
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