Industry News

Ultra-wideband Beginning to Take Off

The market for ultra-wideband (UWB) silicon is finally beginning to take off, reports In-Stat. Though regulatory hurdles over UWB still persist worldwide, the first UWB-enabled notebook PCs have shipped this year from Dell, Lenovo and Toshiba, the market research firm says. “The primary question for UWB now is: Will...
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The Book End

Microwave Filters for Communication Systems: Fundamentals, Design and Applications R.J. Cameron, C.M. Kudsia and R.R. Mansour Wiley Interscience • 802 pages; $135 ISBN: 978-0-471-45022-1 This book captures the fundamentals and practical aspects of modern microwave filter design. Chapter 1 is devoted to an overview of communication systems. The principles...
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Around the Circuit

Industry News John Dunbabin , owner and president of Connecting Devices Inc. (CDI), passed away on September 8, 2007, from pancreatic cancer. A graduate of Cal Poly, San Luis Obispo, with degrees in mechanical engineering and business, John went to work for CDI. In 1975, he and his partners,...
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An Enabling New 3D Architecture for Microwave Components and Systems

How would you like to design circuits with perfectly shielded, low-loss, purely TEM broadband transmission lines, which could be stacked next to and on top of each other with no coupling? The lines can be tens of centimeters long, cross at multiple levels and at any angle, and holes...
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Design of a Microwave Group Delay Time Adjuster and Its Application to a Feedforward Power Amplifier

This article presents a design method for a microwave group delay time adjuster (GDTA) and its application to a feedforward (FFW) power amplifier (PA). The GDTA consists of a variable capacitor and a variable equivalent inductor. The variable equivalen...
As linear modulation and demodulation is adopted in communication systems for spectrum efficiency, the system performance is limited due to nonlinearity, particularly in the power amplifier. The nonlinearity of a system can be explained as AM-AM, AM-PM, intermodulation distortion (IMD) and adjacent channel leakage ratio (ACLR). Several linearizing techniques...
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Expert Advice Responses Page (Febuary)

Published Tuesday, Febuary 19, 2008 | Last Update 3.04.08 Here are your replies to the Febuary Expert Advice column This month, Rafi Hershtig, K&L Microwave talks About the Band-Reject Filter (BRF), or Band-Stop, is the solution of choice in an increasing number of cases. Exhibiting low loss and good...
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Skyworks Increases Shipments of GPRS Front-End Modules for SoC Applications

Mobile World Congress, Barcelona, Spain
Skyworks Solutions Inc., a developer of high performance analog and mixed signal semiconductors enabling mobile connectivity, announced that it has expanded its position in (GPRS) front-end modules (FEMs) through strategic engagements with leading system on chip (SoC) providers. To date, Skyworks has shipped more than 750 million GPRS power...
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TriQuint Launches Compact Quad-Band GSM/Edge Transmit Module

Mobile World Congress, Barcelona, Spain
TriQuint Semiconductor announced the release of its latest quad-band transmit module, the TQM6M5001, as a key member of its wideband code division multiple access (WCDMA) total RF front-end strategy. The module, in the same size footprint of its predecessor, provides full GSM/EDGE (enhanced data rates for GSM evolution) capability....
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