1986

British Television

Tue, 12 Jun 2018 00:19:23 GMT

On 2 November 1936 the world's first high definition television station was inaugurated at Alexandra Palace. Two competing companies, Marconi-EMI Television Company Ltd and Baird Television Ltd, provided studio and transmitting equipment for the new service which operated, on an alternate basis, with the systems of the two companies. After a trial period the 405-line system of the Marconi-EMI company was adopted and the last transmission by the 240-line system of Baird Television Ltd was sent out on 30 January 1937.

This book is concerned with the history of British television for home reception from 1922/23 to 1939, when the London Station closed down for the war years. Great care has been taken to ensure that an unbiased, accurate history has been written and the work is based predominantly on written primary source material. More than 900 references are given in the text, which is illustrated with many photographs and illustrations.

An endeavour has been made to present a balanced history rather than a purely technical history. Thus the book considers the factors - technical, financial and general - which led to the establishment of the world's first, all-electronic, public, regular, high definition television broadcasting service.

Waveguide Handbook

Mon, 11 Jun 2018 23:06:59 GMT

The Waveguide Handbook is an unabridged reprint of the book first published in 1951 by McGraw Hill as Volume 10 of the MIT Radiation Laboratory Series.

Although the primary aim of the book is to present the equivalent-circuit parameters for a large number of microwave structures, a brief but coherent account of the fundamental concepts necessary for their proper utilisation is included. The first three chapters summarise both the field and network theoretic considerations necessary for the derivation and utilisation of the basic transmission line-equivalent-circuit formalism. The mode concept and transmission-line formulation of the field equations are introduced in Chapter 1. This chapter contains an engineering treatment of the transmission-line theory necessary for the description of propagating and nonpropagating modes in the more important types of uniform and nonuniform waveguides. The field-structure, propagation, attenuation, etc., characteristics of the transmission-line modes so described are compiled in Chapter 2, with both quantitive 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 in Chapter 3; also contained in this chapter is a sketch of some of the field theoretic methods employed in the derivation of the equivalent-circuit parameters reported in Chapters 4 to 8. Although most of the above material is written for the impedance-minded microwave engineer, some of the sections should be of interest to the applied mathematician. The remaining chapters contain a compilation of the equivalent-circuit parameters for a variety of nondissipative N-terminal microwave structures. In Chapter 4 a number of two-terminal structures, such as beyondcutoff and radiative waveguide terminations, are treated. Obstacle and aperture discontinuities in waveguides, gratings in free space, etc., are among the four-terminal structures described in Chapter 5. Chapter 6 deals with six-terminal microwave structures and contains the equivalent-circuit parameters for a number of E-and H -plane T- and Y-junctions, bifurcations, etc. Several eight-terminal structures are treated in Chapter 7. Chapter 8 contains the circuit description of a number of typical composite microwave structures; dielectric-filled guides, thick apertures, etc.

This edition also contains a new preface by the editor and several pages of errata which he has collected over the past thirty-five years.

Geometrical Theory of Diffraction for Electromagnetic Waves, 3rd Edition

Mon, 11 Jun 2018 22:20:13 GMT

The continuous development of the Geometrical Theory of Diffraction (GTD), from its conception in the 1950s, has now established it as a leading analytical technique in the prediction of high-frequency electromagnetic radiation and scattering phenomena. Consequently, there is an increasing demand for research workers and students in electromagnetic waves to be familiar with this technique. In this book they will find a thorough and clear exposition of the GTD formulation for vector fields. It begins by describing the foundations of the theory in canonical problems and then proceeds to develop the method to treat a variety of circumstances. Where applicable, the relationship between GTD and other high-frequency methods, such as aperture field and the physical optics approximation, is stressed throughout the text. The purpose of the book, apart from expounding the GTD method, is to present useful formulations that can be readily applied to solve practical engineering problems. To this end, the final chapter supplies some fully worked examples to demonstrate the practical application of the GTD techniques developed in the earlier chapters.