Foreword, May 1980

The next generation of microwave digital systems will require much higher clock frequencies to increase computational speed. Both military and commercial electronics have applications for digital communications with multigigabit-per-second data rates, multi-phase-shift-keyed modulation/demodulation, time multiplexing, frequency division, counting, A/D converters, memories, and frequency and waveform synthesis. During the last several years, significant progress has been made in raising the operating speed of digital microcircuits above the 1-GHz/s level. Advances in silicon IC technology will generate some limited speed improvements, but GaAs IC technology offers a two- to six-times speed improvement for the immediate future and Josephson junction technology projects another two- to three-times speed improvement for the intermediate future.     

Foreword, Nov. 1976

For more than a quarter of a century, engineers and scientists have been challenging the frontier of microwave technology with the prospect of extending it into millimeter-wave systems applications. The progress toward this goal had been relatively slow. In recent years, however, a significantly increased effort has been directed toward the development of various solid-state devices for use at millimeter-wave frequencies. This has brought a rapid progress in the field of millimeter waves in many countries, particularly in Europe, Japan, and North America.     

Foreword, Apr. 1977

Low-noise technology at microwaves has been traditionally motivated by RADAR, terrestrial communication, and radio astronomy applications. In recent years satellite communications and remote sensing have placed added importance on low-noise reception.     

Foreword, Sep. 1981

Electromagnetic wave guiding and transmission are an integral part of microwave, rnillimeter-wave, and optical systems. Passive components can be made with particular waveguide or transmission-line configurations and active components can be realized by installing solid-state devices in them. To design passive and active components, characteristics of related waveguiding structures must be clearly understood.     

Foreword, Jun. 1976

Field-Effect Transistor Technology is a very dynamic field in microwaves today. Improvements in both low-noise and high-power FET's are being made continuously in many countries around the world. It is the purpose of this Special Issue to introduce this topic with a comprehensive review paper and to highlight advances in the development of microwave FET's and their applications. Authors from Japan, Europe, and North America report recent achievements of ongoing work in this issue. Their contributions reflect the following trends in the direction of developments.     

Foreword, Oct. 1978

T he IEEE-S-MTT Technical Committee on Microwave and Millimeter-Wave Integrated Circuits (MTT-6), in its continuing effort to review its field of responsibility, considers it timely to sponsor this issue.     

Foreword, Apr. 1975

The idea for this Special Issue on Microwave Communications grew out of a desire to couple the device and circuit designers within the microwave community more closely to the systems that utilize the outputs of their technologies. Accordingly, this Special Issue has been assembled in order to describe systems either currently operating, or under development, whose concept was stimulated, and existence made possible, by devices and circuits developed by members of the MTT Society and the organizations they represent.