Output pressure enhancement of CMUTs by using multiple Helmholtz resonance apertures. Issue 18 (1st September 2015)

• Record Type: Journal Article
• Authors: Yu, Yuan Yu; Cao, Xue Wen; Pun, Sio Hang; Mak, Peng Un; Vai, Mang I
• Is Part Of: Electronics letters. Volume 51:Issue 18(2015)
• Page Start: 1390
• Page End: 1392
• Publication Date: 2015-09-01
• Subjects: acoustic resonance -- ultrasonic transducers -- ultrasonic imaging; CMUT -- multiple Helmholtz resonance apertures -- air‐coupled capacitive micromachined ultrasonic transducers -- noncontact ultrasound imaging; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.1871
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Multiple Helmholtz resonance apertures are proposed to enhance the output pressure of air‐coupled capacitive micromachined ultrasonic transducers (CMUTs) for non‐contact ultrasound imaging applications. The methodologies of defining the design parameters of CMUTs and the resonant apertures on the membrane of CMUTs are discussed. In comparing certain configurations of resonant apertures with conventional CMUTs, simulation results show that a prospective improvement of output pressure (up to 32.1%) can be achieved.