Radiation resistance of concentric conductor transmission lines

作     者：Whitmer, R 

作者机构：Amherst Coll Dept Phys Amherst MA USA 

出 版 物：《PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS》 (Proc. Inst. Radio Eng.)

年 卷 期：1933年第21卷第9期

页      面：1343-1353页

核心收录：

主　　题：Conductors Transmission lines Wire Power transmission lines Oscillators Distributed parameter circuits RLC circuits Electric resistance Physics Educational institutions 

摘      要：An expression for the radiation resistance of a cylinder is derived, following the tangential field or induced electromotive force method as adapted by Pistolkors. The result is used to determine the radiation resistance of a segment of a concentric cylinder transmission line, as used in ultra-high-frequency oscillator circuits. A comparision is made with the more conventional parallel wire line segment. Numerical computations are made for the case of a line one-half wavelength long, with a radius (for the concentric line) and a spacing (for the open line) of one-twentieth of a wavelength. These are believed to be the largest dimensions to be encountered in practice. The resistances are, respectively, 0.086 ohm and 3.02 ohms, showing the concentric line to be definitely superior as far as radiation losses are concerned.