Design And Implemention Of Broadband Transmitter

Sonar transmitter is a very important component of sonar system,whose qualityperformance has a significant impact to the whole sonar system,and different sonar systemalso has different requirements.The main task of the paper is to study and design a sonartransmitter which can be used to underwater acoustic communication.The paper discuss and confirm the basic component,which including supplycircuit,protection circuit,driving circuit,power amplifier circuit,transformer and so on.Inallusion to the launch of the underwater acoustic communication transmitter is broadbandsignal and in the bandwidth whose impedance characteristics is different, the paper addbroadband matching circuit.The broadband matching circuit make the large difference soundlevel become smooth.In the meantime,in order to test the transmitter and easily makeamendments to test signal parameters of the transmitter,the paper design the signal producecircuit and test signal base on FPGA,finally complete the design and debugging of theunderwater acoustic communication transmitter.Test results show that,the bandwidth of underwater acoustic communication transmitteris greater than7kHz.In the bandwidth,the source level is up to187dB,and the ups and downsis no more than3dB.the performance parameters meet the design index requirement.