Microwave Journal articles from June 1998

Microwave Journal archives from June 1998

InP-based HBT technology for next-generation lightwave communications. (heterojunction bipolar transistor)
June 1, 1998... InAlAs/InGaAs-InP heterojunction bipolar transistor (HBT) technology offers high device speed, low 1/f flicker noise and monolithic integration of 1.55 [[micro]meter] InGaAs photodetectors making them well suited for next-generation, high data...

Countdown to the microwave millennium.
June 1, 1998... If a seasoned observer of the European microwave and RF market was asked to describe the status of play of the major companies, the answer could be summarised in two words: stabilisation and consolidation. There seems to be little doubt that the...

A quarter-wavelength antenna with superposed square patches.
June 1, 1998... This article proposes a method whereby the cross-sectional area of microstrip antennas using superposed square patches is decreased while the bandwidth is increased. The quarter-wavelength antenna principle is applied, however, the short circuits...

European pacts to challenge US dominance. (defense electronics and microwave industries)
June 1, 1998... The state has traditionally played a major role in the defence electronics and microwave industries in Europe. Typically, this involvement has been evident through the ownership of most major companies and in the amount of business these...

A new PLL with fast settling time and low phase noise. (phase-locked loop)
June 1, 1998... A fundamentally new phase-locked loop (PLL) synthesizer has been developed that exhibits extraordinary performance with fast frequency hopping (FH) (less than 20 [micro]seconds] and lower phase noise (reduced more than 25 dB). The improved PLL...

Microwave technology: directions and measurement requirements for the 21st century. (National Institute of Standards and Technology's workshop for the microwave and radio equipment industry)
June 1, 1998... The Electromagnetic Fields Division of the National Institute of Standards and Technology's (NIST) Electronics and Electrical Engineering Laboratory is hosting a workshop that will review NIST support for the RF/microwave industry. This workshop...

Low voltage power amplifiers for GSM handsets. (Global System for Mobile communications)(Column)
June 1, 1998... As each successive generation of cellular telephones becomes smaller and lighter, so must the battery technologies that power them. The new generation of cellular telephones will incorporate batteries with low operating voltages between 2.8 and...

A new suite of RF/microwave design tools. (Microwave Office)(Product Announcement)
June 1, 1998... Microwave Office is a completely new suite of RF/microwave design tools built from the ground up for operation in Windows[R] '95 and NT environments. Included in the suite are the VoltaireXL[TM] linear and nonlinear circuit simulator and the...

Surface-mount NPO capacitors with ultra-high self-resonant frequencies.(Product Announcement)
June 1, 1998... As surface-mount technology responds to the challenge of functioning at higher microwave frequencies, the performance demands on both active and passive components have become increasingly stringent. Typically, ceramic multilayer capacitors (MLC)...

A 5 W MMIC driver amplifier for PCS base stations. (RMPA1911-96 GaAs power amplifier)(Product Announcement)
June 1, 1998... Today's wireless telecommunications equipment demands high performance, low cost components that are readily available and easy to implement. The model RMPA1911-96 GaAs power amplifier is a high efficiency, 5 W unit supplied in a metal-based...

Active and Quasi-optical Arrays for Solid-state Power Combining.
June 1, 1998... Robert A. York and Zoya B. Popovic John Wiley & Sons Inc. 526 pages; $89.95 The quasi-optical approach is particularly attractive at millimeter and submillimeter wavelengths. Most of the basic components in microwave receivers and transmitters...

Generalized Filter Design by Computer Optimization.
June 1, 1998... Djuradj Budimir Artech House Inc. 232 pages; $79, [pounds]65 Electromagnetic simulators currently are being coupled with sophisticated optimization systems, providing a much more powerful tool for microwave computer-aided filter design. This...