RADIO ASTRONOMY IN MILLIMETRE WAVES AND BEYOND NOBEY AM A RADIO OBSERVATORYAND ITS RECEIVER DEVELOPMENT J Inatani". N Kaifu" ABSTRACT Nobeyama Radio Observatory has contributed to the recent progress of millimetre wave astronomy with the 45-m telescope and the millimetre array. High spatial resolution realized by these two telescopes has revealed detailed structure of the star forming regio

SUPERCONDUCTIVITY K.Araki, AND ITS APPLICATION M.Morisue* Abstract This paper surveys the current work in superconductor electronics The main purpose of the paper will be to review the application activities and digital signal-processing circuits, magnetic sensors, voltage standards, and microwave and millimeter-wave receiver components, in both low Tc Tc superconductivity. in Japan. in analog s

GaAs MESFETs AND RELATED MONOLITHIC AS BROADBAND MICROWAVE CONTROL STRUCTURES DEVICES RONALD J. GUTMANN RENSSELAER POLYTECHNIC INSTITUTE TROY, NEW YORK 12180-3590 ABSTRACT GaAs MESFETs are becoming more widely used in control components such as switches, phase shifters and variable attenuators. In this review GaAs MESFET control devices are compared with Si PIN diodes, with an emphasis on devi

RECENT MICROWAVE APPLICATIONS TO RADAR IN THE U.S. R. A. Sparks* ABSTRACT Microwave hardware developments from several major companies and government laboratories are described that have applications in radar systems currently being developed in the United States. Major trends are evident in the evolution of solid state active array components and integration of multifunctions in a common apertu

STRATEGIES FOR MICROWAVE AND MILLIMETER WAVE PACKAGING TODAY Bert Berson, Berson & Associates, Mountain View, CA, USA Abstract """,,,,,,,,,,,,,,,,,""""'"'''''''''''''' Microwave and millimeter wave package requirements differ considerably from those for low frequency applications. Microwave packages are characterized by a low lead count (usually less than 20), with high lead-lead isola

THE FUTURE SYMBIOSIS OF OPTICAL FIBRE AND MICROWAVE RADIO SYSTEMS Peter Cochrane ABSTRACT Many of the time-honoured techniques developed during the sixty-year history of microwaves are now being adopted for optical fibre applications. Until comparatively recently, optical systems were more akin to the early wireless spark transmitters rather than the now sophisticated and ubiquitous radio syst

RECENT TRENDS IN GIGABIT LOGIC E H Perea * ABSTRACT In the past years, GaAs has clearly demonstrated its potential to perform very high speed digital signal processing functions. Today, GaAs has entered the high speed ASIC arena and is able to seriously challenge Si ECL both in terms of performance and price. New applications push for still higher levels of integration and lower prices. In this

PHASED ARRAY RADAR AND THE DETECTION TARGETS E R Billam ABSTRACT OF LOW CROSS SECTION * The reduction in the radar cross section of military targets has been widely reported. In this paper the implications with regard to phased array radar are examined. The benefits of phased array radar are outlined and it is shown that this form of radar makes the optimum use of power and aperture and is an i

ANTENNAS FOR SATELLITE SYSTEMS Professor P J B Clarricoats * ABSTRACT The paper begins with a review of satellite systems for communications and broadcast and briefly alludes to the significant scientific space programmes which act as a technology driver for the industry. Progress in satellite antennas is considered under the headings array-fed reflectors and shaped-refldectors. It is in the seco

SATELLITE TELEVISION: THE CHALLENGES OF A MICROWAVE MASS-MARKET J R Forrest ABSTRACT Television broadcasting direct to the home by satellite brings the first prospect of a real mass-production market for microwave electronic equipment. The paper outlines the satellite broadcasting systems coming into operation and then concentrates on the challenges posed in the design and implementation of the m