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Passive Components

Two New High Performance Resonator Materials

June 1, 2003
In the telecoms and other RF component markets, today's climate means that there can no longer be a trade-off between cost and performance - the designer needs to achieve both. Temex has recognized this fact and addressed it through the evolution of two new generations of materials on which...
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Design of a TRM Calibration Kit for the ZMA Coaxial Interface Using Ansoft HFSS

When new coaxial interfaces become available, it is important to validate their performance. The best way to do this is by using a calibration kit that eliminates the effects of adapters in the measurement. This article discusses the design and impleme...
June 1, 2003
One of the greatest challenges in characterizing new coaxial interfaces is to determine an accurate test configuration. When precision airlines are not available it is very difficult to obtain a true measurement of the device under test. It becomes necessary to design and implement calibration standards to eliminate the...
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Fast and Accurate High Power Device Characterization with a Microstrip SOL Method

High power device characterizations, performed with a microstrip short-open-load (SOL) calibration kit, are presented. This article demonstrates an interesting alternative to the classical through-reflect-line (TRL) method, when only terminating impeda...
May 1, 2003
Precise device characterization is the starting point of any good circuit design. This task can be particularly challenging when the device is a high power transistor having low input and output impedances. For devices working only under pulse conditions, specific test benches exist 1 but are rather complicated and...
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100 W RF Transistor for 900 MHz Cellular Applications

April 1, 2003
Upcoming generations of cellular radio systems such as GSM EDGE or UMTS require increasing power levels to meet linearity requirements of transmitted signals. To reduce overall costs, equipment manufacturers aim at reducing the number of transistors in their RF power amplifiers. The consequence is a constant demand for bigger...
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A Cellular Band Power Amplifier/Duplexer Module

April 1, 2003
Wireless communications handsets are increasing in functionality through the addition of features such as GPS, color displays and PDA functions. At the same time the handset is maintaining a roughly constant price and size target. Because of this trend, handset manufacturers are requiring higher levels of integration from component...
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Enterprise Software for RF Device Characterization

March 1, 2003
In today's competitive marketplace the characterization of RF semiconductor devices for modeling, design, applications and process improvement must be faster, more efficient, and more repeatable and accurate as companies strive to improve their product performance, design productivity and time to market. However, help is on hand with the Wavevue...
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Ultra Linear Bandpass Filters

March 1, 2003
A new product line of ultra linear bandpass filters has been introduced that utilize patent pending cross coupling to reduce time delay and phase distortion up to 90 percent. The filters typically utilize a 12-section filter with two inductive and two capacitive non-adjacent couplings to equalize and flatten the...
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2003 Connector, Cable and Cable Assembly Survey

This is the first survey of connectors, cables and cable assemblies sponsored by Microwave Journal. We hope to update it annually with increased industry participation.
March 1, 2003
On December 13, 2002, we sent a questionnaire to 75 companies that provide products and services in this field, with a response deadline of January 11th. We used e-mail rather than the USPS so that we would have feedback that all the questionnaires were received. On January 3, 2003,...
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Quick Mating N Connectors for RF Applications

March 1, 2003
In today's competitive environment designers and engineers are looking for any features that can give them the edge. When it comes to RF connectors, areas where that advantage can be gained are in the speed of installation, flexibility of connection and efficient utilization of space. The QuickLock family of...
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Precision Test Cable Assemblies to 40 GHz

March 1, 2003
The Accu-Testâ„¢ products are a family of precision cable assemblies that are designed for use in the DC to 40 GHz frequency range, intended to facilitate accurate measurements and exhibit low loss characteristics at a competitive price for precision test and measurement applications. The family is currently comprised of...
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