Capacitive ultrasonic transducer with net backplate

Pentti Mattila, Jyrki Stor-Pellinen, Janne Ignatius, Jarmo Hietanen, Mauri Luukkala

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)


A study is presented of the function of an air-coupled capacitive ultrasonic transducer with uniform net backplate. Net backplates are an easy, fast-to-assemble alternative to grooved backplates. The frequency responses of the transducers were measured and the resonance frequencies were estimated. A procedure to study the electrostatics of the transducer with net backplate geometry is described with calculations of surface charge density distribution, capacitance and sensitivity.

Original languageEnglish
Pages (from-to)1119-1125
JournalMeasurement Science and Technology
Issue number8
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed


  • capacitance
  • ultrasonic transmitting response
  • ultrasonic transducer
  • capacitive transducer
  • net backplate
  • air-borne ultrasound


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