On the Radiation Impedance of an Array of Finite Cylinders

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Abstract
A general expression for the radiation impedance of the qth source in an array of n sources has been obtained in terms of Green's functions. It is applicable to finite sources or to sources which are mounted in finite baffles provided the Green's function can be found. The theory is applied to an array of finite cylinders which form part of an infinitely long rigid cylindrical baffle. If ka≪1, the radiation resistance of each member can easily be expressed in terms of sine integrals. Curves showing the radiation resistance of each member of an array of five cylinders are given. The effect of varying the separation is also shown.

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