Book Review: Analog Electronic Circuits

introduced and an engineering treatment is included of the transmission-line theory necessary for the description of propagating and non-propagating modes in the more important types of uniform and non-uniform waveguides. The field-structure, propagation, attenuation, etc. characteristics of the transmission-line modes so described are then compiled with both quantitative and pictorial detail. The elements of microwave-network theory required for the analysis, representation and measurement of the equivalent circuits for N-terminal microwave structures are outlined. The rest of the book contains a compilation of the equivalent-circuit parameters for a variety of non-dissipative N-terminal microwave structures. These results are presented, usually both analytically and graphically, in individual sections having an intentionally concise format to avoid repetition. Since the analytical formulae are frequently cumbersome to evaluate, care has been taken to achieve a reasonable degree of accuracy in the graphical plots. A number of two-terminal structures, such as beyond-cutoff and radiative waveguide terminations, are treated. Obstacle and aperture discontinuities in wave-guides and gratings and arrays in free-space are among the fourterminal structures described. Six-terminal microwave structures are dealt with and the equivalentcircuit parameters for a number ofEand H-plane Tand V-junctions and bifurcations are given. Several eight-terminal structures are treated. The circuit descriptions of some typical composite microwave structures such as dielectric-filled guides, rectangular guides with ridges, rectangular guides with resistive strips and obstacles of large thickness are discussed. The equivalent-circuit results in the various sections involved the expenditure of considerable time and effort by many workers. From 1942 to 1946 an intensive and systematic exploitation of both field and network aspects of microwave problems was carried out at the Radiation Laboratory of M.I.T. by a group of workers among whom J. Schwinger played a dominant role. With an integral-equation formulation offield problems Schwinger pointed the way both in setting up and solving a wide variety of microwave problems. Although conceived at the Radiation Laboratory of M.I.T. the greater part of the book was written in the years subsequent to its close while the author was at the Polytechnic Institute of Brooklyn. Since World War II most microwave engineers and many research students will have referred to 'Marcuvitz'. It is a stimulating book, excellently produced and containing a wealth of information. It will continue to be a valuable reference. F. A. BENSON, Professor ofElectronic Engineering, University ofSheffield