Subsystems and Systems

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Technical Feature Regrowth of Data Spectral Sidelobes from AM/PM Effects and Hard Limiting Frank Amoroso Santa Ana, CA A previous article 1 set forth a framework for analyzing and predicting the power spectral sidelobe regrowth from soft saturating amplification of data signals having small percentage carrier ripple. The results...

Special Report Linearity Requirements for MMICs for 16 Through 128 QAM ETSI Compliant Radios Jim Harvey Mimix Broadband Webster, TX This article highlights some of the regulatory and operational issues that influence linearity requirements and frequency planning aspects of high frequency microwave radios used for point-to-point or point-to-multipoint systems....

Special Report RAWCON2001 Conference Report RAWCON2001 Highlights Interdisciplinary Wireless Data Technology Michael S. Heutmaker RAWCON2001 General Chair The 2001 IEEE Radio and Wireless Conference (RAWCON2001), held in Waltham, MA, on August 19 to 22, 2001, explored interdisciplinary aspects of RF technology and wireless communications. This year several elements of...

Product Feature A Compact High Power SSPA for Satellite Communication Applications Advanced Microwave Technologies Inc., ADVANTECH Dorval, QC, Canada Today's emerging satellite broadband applications require high power amplifiers. In recent years, significant advances have been made in solid-state technology that have resulted in solid-state power amplifiers (SSPA) becoming a...

Technical Feature Advanced RF Technologies for the Wireless Market Yvan Droinet Philips Semiconductors Caen, France Most products in the wireless world require more and more miniaturization. This incentive leads integrated circuit designers to develop innovative architectures with higher and higher integration levels. On the one hand, there is a...

A New Spread-spectrum Measurement Method for Satellite Transponder In-orbit Testing This article introduces a new measurement method for beginning-of-life and in-service testing of satellite transponders that utilizes spread-spectrum signals. The basics of this new method, which permit measurement of amplitude and group delay of a transponder channel, are presented....

PRODUCT FEATURE Wireless Telecommunications Testing with S-series Microwave Power Amplifiers Amplifier Research Souderton, PA Amplifier Research offers a broad range of power amplifiers covering DC to 40 GHz with output power ranging from 1 to 10,000 W. While applications include electromagnetic compatibility (EMC) testing, RF component testing, physics (plasma...

TECHNICAL FEATURE Two Novel Radar Vehicle Detectors for the Replacement of a Conventional Loop Detector In this article, intrusive and non-intrusive radar vehicle detectors, compatible with existing inductive loop detectors (ILD) without any modification of the communication algorithm, have been developed at 24 GHz. The intrusive detector is based...

TECHNICAL FEATURE Adaptive Feedforward Amplifier Linearizer Using Analog Circuitry Alfonso J. Zozaya, Eduard Bertran Albertí and Jordi Berenguer-Sau Dept. of Signal Theory and Communications Polytechnic University of Catalonia Barcelona, Spain Nowadays, feedforward is the most effective and broadly used linearization technique employed in modern multi-carrier communications systems. Different versions,...

EUROPEAN SUPPLEMENT A Long Range View of Short Range Wireless Systems Richard Mumford Microwave Journal European Editor The development of short range wireless systems, particularly Bluetooth and wireless local area networks (WLAN) has captured the industry's imagination, if not the market that was initially predicted. Bluetooth technology originated in...