Textbook in PDF format A vast amount of literature has been published in a wide range of scientific periodicals on special methods of generating, transmitting and detecting radiations of millimetre and submillimetre wavelengths and with the development of associated measuring techniques and components. An attempt has been made in this unique book to collate most of this information and present it in a comprehensive and orderly manner. The subject matter is diverse and specialised and it was clear at the outset that a successful book must be written as a symposium by a panel of authors and not by one person. A team of 23 authors, each of whom has gained an international reputation for original contributions to the field, has taken part in the preparation of the volume