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Industry News

Design Advantages of CDMA Power Amplifiers Built with MOSFET Technology

CDMA power amplifiers are now being produced in volume using MOSFET technology, enabling improvements in amplifier performance and system cost. This article discusses the design characteristics of these very flexible and stable devices and explains how...
Each of the many process technologies that can be used for RF power amplifiers - GaAs HBT, PHEMT, InGaP HBT and silicon RF MOSFET - have different advantages, such as better frequency characteristics, wider linearity and higher power capability. A fundamental comparison of the different process technologies is shown...
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Specifications and Definitions for Quadrature Demodulators and Receiver Design Measurements

This article discusses the common and questionable definitions of the specifications for quadrature demodulators, including gain, intercept point and noise figure. Emphasis is on the mapping between single-tone measurement data and the modulated signal...
The quadrature demodulator is used in either heterodyne or homodyne receivers. In commercial communication receivers, the local oscillator frequency ranges from a few kilohertz to a few gigahertz. It is usual to test the individual part with a single tone to avoid the complexity of the baseband waveform. The...
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Reviewing the Basics of Suspended Striplines

Suspended striplines are widely used for several reasons. They provide high Q-factor, wide bandwidth and good temperature stability. This tutorial reviews some of the basic principles and new concepts for suspended striplines.
There are several reasons for the wide use of printed transmission lines. They are simple to produce, they operate over a wide bandwidth, and have small weight and dimensions. The earliest form of printed transmission lines was the stripline ( Figure 1a ). 1,2 The printed stripline consists of...
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Harris Corp. Selected for Phase 1 of US Army's WIN-T Program

Harris Corp. announced that it anticipates the award of a major subcontract from Lockheed Martin Mission Systems, Gaithersburg, MD, for the design and test of the wireless transmission system architecture as part of the three-year competitive down-select for Phase One of the US Army's Warfighter Information Network-Tactical (WIN-T) program....
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Northrop Grumman and Flarion Promote Scalable Homeland Security Wireless Network

Northrop Grumman Corp.'s Information Technology (IT) sector, a leading provider of advanced IT solutions, engineering and business services for government and commercial customers, and Flarion Technologies, the architect of a mobile broadband network technology for personal computing for data and voice using the industry standard Internet Protocol (IP), announced...
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Teledyne Wins $22 M Contract from Space and Missile Defense Command

Teledyne Technologies Inc. announced that Teledyne Brown Engineering Inc. has received a five-year, $22 M contract from the US Army's Space and Missile Defense Command, to continue the development of Teledyne's Missile Defense Systems Exerciser (MDSE). The contract contains provisions for five one-year award-term options, which, if exercised, would...
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New Start FY2003 FCT Projects Highlight Rest-of-the-World Electronics

New starts for America's Fiscal Year 2003 Foreign Comparative Testing (FCT) programme highlight a range of rest-of-the-world electronics, the key elements of which are as follows: • Anti-jam Global Positioning System (GPS) antenna A US Navy effort to evaluate a Raytheon Systems Ltd. (UK) developed shipboard anti-jam GPS antenna....
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lSEVIRI to Help Nowcasting Meteorology

Successfully launched aboard the European Space Agency/European Meteorological Satellite's (EUMETSAT) Meteosat Second Generation (MSG)-1 satellite on 28 August 2002, the Astrium-sourced Spinning Enhanced Visible and Infra-Red Imager (SEVIRI) payload is set to radically upgrade the accuracy of nowcasting short-term weather forecasting for Europe, Africa and the Atlantic and Indian...
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