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TitleWideband and wide beam polyvinylidene difluoride (PVDF) acoustic transducer for broadband underwater communications
Author(s)Martins, Marcos Silva
Faria, Carlos L.
Matos, Tiago
Gonçalves, L. M.
Cabral, José
Silva, António
Jesus, Sérgio M.
Keywordspolymer ultrasound transducer
PVDF acoustic emitter
wideband acoustic emitter
wide beam acoustic emitter
very high frequency acoustic emitter
acoustic broadband communications
underwater wireless communications
Issue date16-Sep-2019
PublisherMultidisciplinary Digital Publishing Institute
CitationMartins, M.S.; Faria, C.L.; Matos, T.; Goncalves, L.M.; Cabral, J.; Silva, A.; Jesus, S.M. Wideband and Wide Beam Polyvinylidene Difluoride (PVDF) Acoustic Transducer for Broadband Underwater Communications. Sensors 2019, 19, 3991.
Abstract(s)The advances in wireless communications are still very limited when intended to be used on Underwater Communication Systems mainly due to the adverse proprieties of the submarine channel to the acoustic and radio frequency (RF) waves propagation. This work describes the development and characterization of a polyvinylidene difluoride ultrasound transducer to be used as an emitter in underwater wireless communications. The transducer has a beam up to 10° × 70° degrees and a usable frequency band up to 1 MHz. The transducer was designed using Finite Elements Methods and compared with real measurements. Pool trials show a transmitting voltage response (TVR) of approximately 150 dB re µPa/V@1 m from 750 kHz to 1 MHz. Sea trials were carried in Ria Formosa, Faro (Portugal) over a 15 m source—receiver communication link. All the signals were successfully detected by cross-correlation using 10 chirp signals between 10 to 900 kHz.
Publisher version
AccessOpen access
Appears in Collections:DEI - Artigos em revistas internacionais

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