WCDMA versus GSM: handset performance testing
Sep 1, 2003
By Rob VanBrunt [For a copy of this article in PDF format, which displays figures and equations, click here. Requires Adobe Acrobat Reader, free download.] Wideband Code...
Products
Sep 1, 2003
Amplifiers Power amplifier module Skyworks Solutions Inc. introduced a power amplifier (PA) module with a 6 mm 6 mm 1.2 mm module for tri-band GSM/GPRS...
An integrated downconverter circuit in 0.8 m SiGe technology for DCS-1800 applications
Sep 1, 2003
By E. Hernández, R. Berenguer, J. Meléndez, N. Rodríguez, and J. Aguilera Frequency converters are an important part of most RF front-ends. As there are
no ADCs with several bits that can process information at GHz frequencies, the
frequency downconverter circuit plays a decisive role on every receiver. This
article describes a downconverter circuit for DCS-1800 applications....
The new RF Design
Sep 1, 2003
Todd Judd Erickson Editor terickson@primediabusiness.com Welcome to the new RF Design. Obviously, we've made quite a few changes to the magazine's style and design. I'll run through a quick tour to point out...
Multitone IMD offers clearer picture of MCPA performance
Sep 1, 2003
By Marta Iglesias Characterizing distortion is essential when evaluating multicarrier power amplifier (MCPA) performance. Traditional two-tone tests for intermodulation distortion (IMD) or single-carrier adjacent channel power ratio (ACPR) measurements are not sufficient to evaluate MCPAs. These amplifiers must instead be evaluated using multiple carriers as the stimulus, which more realistically simulate conditions the amplifiers will encounter in service. As an alternative to multiple carriers, multiple tones w...
Unlicensed Technologies
Sep 1, 2003
Precision location system Multispectral Solutions Inc. announced the grant of equipment authorization from the FCC for the company's PAL650 UWB precision...
Bluetooth shifts up a gear: Intelligent tools solve in-vehicle RF range and interference issues
Sep 1, 2003
By Ken Noblitt In-vehicle broadband services offer a huge potential market for Bluetooth
technology. But interference from existing in-vehicle RF devices can be
detrimental to Bluetooth broadband signals and existing interference defenses
may not provide adequate protection. Channel quality driven data rate (CQDDR)
is a Bluetooth option that promises to ensure optimum data throughput....
literature
Aug 1, 2003
Noble Publishing books and CD-ROM courses Noble Publishing Corp. released its newest CD-ROM training courses and books. RF/Microwave Transistor Amplifier...
Errata
Aug 1, 2003
Todd Judd Erickson In the July 2003 issue, the Antenna Product and Provider Matrix listed Kathrein-Werke KG. That entry should have read, Katherine-Scala is the North American...
High-temperature superconductor filter technology breaks new ground
Aug 1, 2003
By Randy Simon Successive generations of wireless systems based on HTS technology continue to offer increasing performance, high reliability and continued tailoring to the specific needs of today's wireless networks. Thousands of HTS systems are deployed today in wireless networks and the rate of adoption of the technology continues to grow....
product focus semiconductors/ICs
Aug 1, 2003
Modular rfPIC development tool Microchip Technology Inc. introduced the rfPIC development Kit 1, which allows design engineers to evaluate low-power radio...
Harmonics and double side bands
Aug 1, 2003
By Keith Vick I've received many responses to my first RF Fundamentals column. There were two messages I overwhelmingly received. First, many people wrote that this...
Bluetooth v1.2 Single Chip Silicon
Aug 1, 2003
Cambridge Silicon Radio Inc. (CSR) launched its third generation Bluetooth single chip silicon, BlueCore3. The company says it is the first complete implementation...
products
Aug 1, 2003
AMPLIFIERS Wideband amplifier Remec Inc. introduced the first in a series of new broadband amplifiers designed and manufactured for operation in the 2.0...
Changing designs, changing perceptions
Aug 1, 2003
Todd Judd Erickson Editor terickson@primediabusiness.com RF Design has received a few inquiries from people questioning the upcoming changes to the magazine starting in the September issue. Some readers are...
products
Jul 1, 2003
AMPLIFIERS A 4 Watt, 30 GHz packaged amplifier TriQuint Semiconductor Inc. introduced the TGA4905, a 4 W packaged transmit amplifier for satellite ground...
Let's face it, it's time for a face lift
Jul 1, 2003
Todd Judd Erickson Editor terickson@primediabusiness.com Change is inevitable. People change, product designs change, even entire markets change. The wireless device markets are in the midst of changing from...
Digitally controlled, variable-gain amplifier
Jul 1, 2003
Maxim Integrated Products Inc. introduced the MAX2055, which the company says is the industry's first high-performance, digitally controlled, variable-gain,...
