Solid State Materials have been gaining importance in recent times especially in the context of devices which can provide necessary infrastructure and flexibility for various human endeavours. In this context, microwave materials have a unique place especially in various device applications as well as in communication networks. Various technological developments are taking place in fine-tuning these materials for specific applicatio"ns and in fixed band frequencies. Though the science and technology of these materials has reached an advanced stage, systematic attempts are still lacking in bringing all available information in a single source. The present. volume is a modest attempt in this direction, though it cannot be considered to be the one that satisfies completely desired components and information required. The editors have enlisted certain articles of interest in this area, especially those dealing with measurement techniques, chapters dealing with materials like Ferrites, YIGs, Radome and high Tc superconducting materials which are of current interest. The editors are fully aware that the coverages are not comprehensive either in scope or in depth. The purpose of this volume is only to acquaint oneself of certain aspects of a fast developing field. The editors will be grateful for any comments or suggestions in this endeavour. V. R. K. MURTHY S. SUNDARAM B. VISWANATHAN Contents Preface v 1. Materials and Processes in Microwave Integrated Circuits Fabrication 1 T. Rs. Reddy 2. Materials and Technology for Microwave Integrated Circuits 30 Bharathi Bhat and Shiban K. Koul 3.