圆柱体上均匀圆阵的阵增益分析  

Array Gain Analysis of Uniform Circular Array Mounted on a Cylinder

作　　者：刘铁林[1] 张成[1] 王一波[1] 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《火力与指挥控制》2013年第8期9-12,共4页Fire Control & Command Control

基　　金：国家自然科学基金面上资助项目(60672143)

摘　　要：以环绕在圆柱体上的均匀圆阵为阵列模型,研究了圆阵在不同条件下的阵增益。从声传播理论出发,分析了平面波入射条件下阵列周围声场,得出了阵列常规处理增益和超增益的表达式。仿真结果表明,刚性圆柱体的存在增大了阵列的处理增益,当存在非刚性圆柱体时,通过合理设置非刚性圆柱体的阻抗,可以在特定的频段内进一步提高阵列的增益,当圆阵与圆柱体之间存在空隙时,阵列处理增益会有所下降。The array gain of Uniform Circular Array（UCA） under different circumstances is studied based on the array model of a UCA mounted on a cylinder.The sound field around the array caused by a plane wave is analyzed using sound propagation theory and algebraic expressions of array gain and array supergain are derived.Simulation results demonstrate that the cylinder can improve the array gain.When the UCA mounted on an air-coupled cylinder,the array gain can be improved further in special frequency band by setting the impedance carefully.The offset between the array and the cylinder can reduce the array gain to a certain extent.

关 键 词：阵增益 超增益 均匀圆阵 

分 类 号：TN911.7[电子电信—通信与信息系统]