Navigation-communication-integrated metamaterial sonar for underwater vehicles

A navigation-communication-integrated metamaterial sonar for underwater vehicles, comprising:

• a disc array and a backboard;
• wherein the disc array comprises a group of uniformly arranged discs with same diameters, same intervals and overlapped axes, and the disc array is located at one side of the backboard;
• water gaps are arranged between the backboard and the disc array and between two adjacent discs of the disc array;
• thicknesses g of several water gaps are same, and a transducer is placed at an axial center of one water gap of the disc array;
• the transducer emits and receives underwater acoustic signals in two ways:
• receiving and emitting combined or separated;
• by adjusting a period p of the disc array, a board thickness t1 of each disc, the thickness g of each water gap, a radius w1 of the disc array, a radius w2 and a thickness t2 of the backboard, working states of an underwater navigation and an underwater acoustic communication are flexibly switched by changing working frequencies, and a navigation-communication-integrated sonar is realizable.