A Wideband and a Wide - Beamwidth Acoustic Transducer Design for Underwater Acoustic Communications

This paper is concerned with the design of an efficient, wideband and a wide-beamwidth resonant acoustic transducer for high frequency use. The general transducer structure which has two back-to-back quarter wave thick 1-3 composite ceramic elements at resonance frequency is -load - introduced. The transducer is employed for both transmit and receive modes. Design of transmitting and receiving transducers are discussed Several transfer functions are derived and their effective bandwidths are calculated. It is shown that the phase angle difference between two acoustic ports in receive mode can be processed at the electrical ports to maintain better throughput. The paper includes future works to be done. It is concluded that the proposed structure can be used for applications of spread spectrum schemes in underwater communications.