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Industry News

An RF Signal Generator Offering Full Digital, Vector and Analog Modulation

The humble signal generator has come out of its modest, functional shell and taken on a streamlined, compact, state-of-the-art persona with the development of the 3410 series. This family of digital RF signal generators has evolved in response to the worldwide growth of second- and third-generation wireless communications systems...
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Single- and Dual-branch Downconverter ICs for Wireless Base Station Applications

A new family of single- and dual-branch converter integrated circuits has been introduced for use in mobile infrastructure base stations. The new CV series converters are all priced below $10 in volume and are available in a 6 x 6 mm QFN package, as shown above. Their small size...
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An LTCC Double-balanced Mixer

Double-balanced mixers are used extensively in transmitters and receivers. For frequencies below 5 GHz, the designs are normally realized using ferrite-based transformers, because they are very compact and their technology is mature. As the operating frequency increases, distributed element baluns become smaller in size and more attractive. Semiconductor-based mixers...
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The Old Order Changeth - Again!

I find it hard to believe that it has been 12 years since Howard Ellowitz wrote a similar message announcing his retirement and introducing me as the new Publisher/Editor of Microwave Journal . Now it is my turn to slow down a little and find some breathing room. With...
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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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