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PROGRESS IN MICROWAVE HIGH-POWER DEVICES
PROGRESS IN MICROWAVE HIGH-POWER DEVICES Shigekazu Hori * ABSTRUCT This paper describes the recent progress of the microwave highpower devices in Japan, especially forcussing on GaAs power FETs. The fabrication process of power GaAs FET chips, and the internally matched power FETs covering from C- to Ka-band are described. New compound semiconductor devices such as InP MISFETs and HEMTs are
HEMT's AND NEW DEVICES FOR HIGH-SPEED APPLICATIONS
HEMT's AND NEW DEVICES FOR HIGH-SPEED APPLICATIONS M. Fukuta, Y. Hirachi* ABSTRACT This paper describes the state of the art in the research and development of HEMT's and new devices for microwave-frequency and high-speed applications in Japan. Low-noise HEMT's have already been commercial available, and are successfully utilized in the application such as satellite-communications and radio ast
MMIC RESEARCH AND DEVELOPMENT
MMIC RESEARCH Masami Akaike* AND DEVELOPMENT ABSTRACTS The MMIC (Monolithic Microwave Integrated Circuit) has great potential in constructing microwave equipment due to its light weight, small size, and high reliability. It is now stepping into practical application in various communications equipment. This paper presents recent research and development activities for GaAs MMICs in Japan.
CURRENT DIRECTIONS IN LIGHTWAVE LOCAL AREA NETWORKS
THE STATUS OF MICROWAVE TERRESTRIAL COMMUNICATIONS IN THE USA
THE STATUS OF MICROWAVE TERRESTRIAL COMMUNICATIONS IN THE USA H. SOBOL* ABSTRACT The current status and major directions in the technologies and network applications of microwave radio in the U.S. are discussed. Virtually all future work will be on digital radios. The large growth and potential of lightwave transmission will have a significant impact on future deployment of microwave radio, bu
ADVANCED SATELLITE COMMUNICATIONS TECHNOLOGIES
ADVANCED SATELLITE COMMUNICATIONS P. V. de Santis* TECHNOLOGIES ABSTRACT An overview is presented of the most recent advances in satellite communications technologies in the USA. Microwave technologies associated with scanning and multibeam antennas, on-board regeneration and routing, solid state power amplifiers and small earth stations are reviewed in this paper.
APPLICATIONS OF MICROWAVES TO REMOTE SENSING
APPLICATIONS OF MICROWAVES TO REMOTE SENSING Erwin Schanda* ABSTRACT --_._----Extensive theoretical studies as well as laboratory and field measurements of rough-surface scattering and emission from agricultural soil and sea surface and of volume scattering and emission from snow and vegetation yield a considerable comprehension of the interaction of microwaves with the molecular properties and
MEDICAL APPLICATIONS OF MICROWAVES
MEDICAL APPLICATIONS OF MICROWAVES J. Bach Andersen x) ABSTRACT Microwaves find a use both in therapy and diagnosis. The most promising applications are still with heating of tumours and the retrieval of the corresponding temperature distributions. Microwave imaging is of interest in itself, but must compete with other techniques offering greater resolution.
APPLICATIONS OF MICROWAVES TO ANTIPROTON CONTROL
APPLICATIONS B. Autin, OF MICROWAVES TO ANTIPROTON CONTROL F. Caspers, L. Thorndahl* G. Carron, ABSTRACT A major achievement in particle accelerator physics has been the invention of stochastic cooling, a method which increases the density of beams of rare particles, like antiprotons, by several orders of magnitude. The beam circulates in a storage ring where it is sampled by electromagnetic de
MICROWAVE SENSOR APPLICATIONS IN INDUSTRY
MICROWAVE SENSOR APPLICATIONS IN INDUSTRY Martti Tiuri ABSTRACT Microwave measuring methods can be applied to determine the properties of materials and hence it is possible to develop microwave sensors for processing industry. The first applications were in moisture measurement but lately many new sensor applications have appeared. Microwave sensors especially suitable in forest industry (woo