About the Author
Alan J. Sangster received a B.Sc. in Electrical and Electronic Engineering in 1963, an M.Sc. in 1964, and a Ph.D. in 1967, all from the University of Aberdeen in Scotland. His research interests have been in the areas of microwave antennas, mm-wave sensing, electrostatically driven micromotors and microactuators, electromagnetic levitation, medical applications of microwaves, microwave propagation in geological strata, satellite communications at microwave frequencies, and the numerical solution of electromagnetic radiation and scattering problems. He is the author of over 230 papers on these topics. Professor Sangster spent four years with Ferranti plc, Edinburgh, Scotland, pursuing research into wide-band travelling wave tubes, and three years with Plessey Radar Ltd., Cowes, U.K., investigating and developing microwave devices and antennas for microwave landing systems and frequency scanned radar systems. Since 1972, he has been with the Heriot-Watt University, Edinburgh, where he became a full Professor of Electromagnetic Engineering in 1989. He retired in 2006, but continues to act in a professorial capacity as a consultant to industry on microwave antennas and microwave component design. He is a Chartered Electrical Engineer, a Fellow of the Institution of Engineering Technology (U.K.), and a Member of the Electromagnetics Academy (U.S.A.).