Airborne broad-beam emitter from a capacitive transducer and a cylindrical structure

F. Guarato, G. Barduchi de Lima, J.F.C. Windmill, A. Gachagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

2 Citations (Scopus)
128 Downloads (Pure)


Beamwidth broadening of an ultrasonic air-coupled transducer is performed by an emitter constituted of an electrostatic transducer and of a cylinder with an opening at the top covering the surface of the transducer. The acoustic emission is thus forced through a hole smaller than the diameter of the transducer’s surface. In particular, a cylinder with an upper diameter of 10mm and a height of 5mm ensures the beam pattern of the final emitter is broad across a wide frequency range. Sound attenuation is reduced and lobes in the transducer’s beam pattern are cancelled. Beam broadening can improve range estimation techniques and ultrasonic sonar as a wider area can be inspected with one emission with no need for scanning.
Original languageEnglish
Title of host publication2016 IEEE International Ultrasonics Symposium (IUS)
Place of PublicationPiscataway
Number of pages4
ISBN (Print)9781467398985
Publication statusPublished - 3 Nov 2016
EventIEEE International Ultrasonics Symposium 2016 - VINCI Convention Center, Tours, France
Duration: 18 Sept 201621 Sept 2016

Publication series

ISSN (Electronic)1948-5727


ConferenceIEEE International Ultrasonics Symposium 2016
Abbreviated title2016 IEEE IUS
Internet address


  • beam pattern
  • broad beamwidth
  • ultrasonic emitter
  • airborne transducer
  • sonar
  • ultrasonic ranging


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