Radio Transmission Lines and Wave Guides

Abstract

THE problem associated with the applications of radio waves to communication, location or navigation is to generate high-frequency alternating currents and convey them from the source to an antenna system which radiates the waves into space. The connecting link between the source and the radiator is termed a transmission line, and for moderately high radio frequencies may comprise a system of two parallel wires, or a coaxial cable or some elaboration of these. At the very high frequencies corresponding to wave-lengths less than a few centimetres in length, this transmission line system takes the form of hollow conductor of circular or rectangular cross-section termed a wave guide. The two books under review deal respectively with transmission lines and wave guides as used in modern radio frequency technique. Electrical Transmissions in Steady State By Paul J. Selgin. (Radio Communication Series.) Pp. ix + 427. (New York and London: McGraw-Hill Book Co., Inc., 1946.) 25s. The Physical Principles of Wave Guide Transmission and Antenna Systems By Prof. W. H. Watson. (International Monographs on Radio.) Pp. xiv + 208. (Oxford: Clarendon Press; London: Oxford University Press, 1947.) 20s. net.