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Industry News

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
April 1, 1998
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
April 1, 1998
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
April 1, 1998
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
April 1, 1998
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
April 1, 1998
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
April 1, 1998
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
April 1, 1998
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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Around the Circuit

April 1, 1998
Around the Circuit INDUSTRY NEWS Telecommunication equipment supplier Eagle Wireless International Inc. , Houston, TX, has completed its acquisition of the assets of electronic wellhead controller manufacturer W&H Development Inc. , also of Houston. Eagle Wireless reports that W&H Development’s products will help expand the functionality and markets for...
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New Literature

April 1, 1998
New Literature Product Application Brochure This eight-page brochure includes specifications on radar amplifiers, CW TWT amplifiers, electromagnetic compatibility amplifier systems, laboratory amplifiers and transmitters. Applied Systems Engineering Inc., Fort Worth, TX (817) 249-4180. Ceramic-to-metal Component Brochure This six-page brochure outlines ceramic-to-metal components designed to withstand demanding environments, including extreme...
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COMPONENTS

April 1, 1998
COMPONENTS Step Attenuators The models 50V10 and 50V70 rotary step attenuators provide attenuation ranges of 0 to 10 dB and 0 to 70 dB over the cellular/personal communications service (PCS) frequencies of 800 to 2000 MHz. Each unit is supplied with index stops, knobs and provisions to panel mount...
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