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Industry News

Commercial Market

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Commercial Market First Four Globalstar Satellites Launched The first four low earth orbit (LEO) satellites of the Globalstar system were launched in February from Cape Canaveral, FL. The $2.6 B Globalstar system, which comprises 48 LEO satellites and approximately 60 ground stations, will provide worldwide telephone service via cellular-sized...
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The Book End

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The Book End RF Microelectronics Behzad Razavi Prentice Hall 335 pages; $70 This book deals with the analysis and design of RFICs and systems with a specific focus on RF electronics, leading into the design of RF transceivers and circuits. The text emphasizes architecture and circuit-level issues with respect...
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A Low Cost DC to 500 MHz Logarithmic Amplifier

A logarithmic amplifier IC that eliminates the need for conversion to baseband, thereby reducing subsystem cost and complexity
Analog Devices Inc.
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A Low Cost DC to 500 MHz Logarithmic Amplifier Analog Devices Inc. Wilmington, MA Logarithmic amplifiers are key components in a wide range of RF system applications. By virtue of its DC to 500 MHz frequency range and 92 dB dynamic range, the model AD8307 logarithmic amplifier can be...
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A 900 MHz, Single-supply GaAs Power Amplifier IC

A single-supply, 4.8 V monolithic GaAs IC power amplifier designed for use in Global System for Mobile communications applications
ANADIGICS Inc.
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A 900 MHz, Single-supply GaAs Power Amplifier IC ANADIGICS Inc. Warren, NJ The current trend toward making cellular telephones smaller, lighter and more efficient continues to place high demands on component manufacturers to follow suit. Global System for Mobile communications (GSM), the largest segment of the cellular marketplace, appears...
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A 50 W, Solid-state C-band Amplifier for Outdoor Use

A cost-effective, 50 W booster amplifier that is lightweight and requires little maintenance is featured on this month's cover
Wavesat Inc.
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A 50 W, Solid-state C-band Amplifier for Outdoor Use Wavesat Inc. Montreal, Quebec, Canada Satellite communications systems are expanding at an unprecedented rate and service providers require increasing numbers of satellite uplink stations to satisfy their customers’ needs. At the same time, cost control becomes a critical concern when...
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An RF Distribution Amplifier

A distribution amplifier that provides a means of supplying an RF sine wave reference signal to multiple stations without degradation or interaction
Datum Inc.
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An RF Distribution Amplifier Datum Beverly, MA The task of delivering a centralized reference signal to a number of different equipment stations without degrading the signal or creating crosstalk can be difficult, particularly when up to 100 locations require this signal. This situation is encountered in many engineering and...
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An OCXO with Rubidium Oscillator Performance

An oven-controlled crystal oscillator (OXCO) that maintains performance characteristics comparable to Rubidium oscillators without their high cost and inherent wear-out
MTI-Milliren Technologies Inc.
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An OCXO with Rubidium Oscillator Performance MTI-Milliren Technologies Inc. Newburyport, MA Precision crystal oscillators are widely used in systems for navigation, such as Global Positioning System (GPS) and cellular telephone applications. In many ways, the crystal oscillator is the cornerstone in determining critical performance such as bit error rates,...
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Design of a Wideband, High Dynamic Range Downconverter Used in Smart Antenna Applications

Design of a wideband, high dynamic range amplifier from concept through production and the critical role it plays in the Smart Adaptive Applique system
David A. Hairfield, Phillip D. Harvey, Yvonne L. Krayer and Troy S. Voytko
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Design of a Wideband, High Dynamic Range Downconverter Used in Smart Antenna Applications This article details the design of a wideband, high dynamic range downconverter from concept through production. The downconverter is a part of the Smart Adaptive Appliqué (SAA) used in cellular base stations to increase channel utilization...
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Effects of Matching on RF Power Amplifier Efficiency and Output Power

The effects of matching the large-signal input and load impedances of an active device during RF power amplifier design
Francisco Javier Ortega Gonzalez, Jose Luis Jimenez Martin and Alberto Asensio Lopez
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Effects of Matching on RF Power Amplifier Efficiency and Output Power To date, one of the most important design methods for RF power amplifiers (PA) still consists of matching the large-signal input and load impedances of an active device. These large-signal impedances are supplied by the manufacturer of the...
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Cellular Mobile Radio Communication Channels in View of Smart Antenna Systems

The different parameters that define the radio communication channel, as well as variables that are important in view of multi-antenna systems
David Robbins and Moeness G. Amin
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Cellular Mobile Radio Communication Channels in View of Smart Antenna Systems Smart antenna systems use signal processing methods in conjunction with multiple antennas to achieve significant improvements in capacity and range for wireless mobile communications. Temporal and spatial filtering techniques are devised to effectively mitigate co-channel interference and remove...
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