Industry News

The Commerical Market

The Commercial Market IEEE Standard Extends Wireless Communications to Inexpensive Applications A new standard from the Institute of Electrical and Electronic Engineers (IEEE) opens the world of wireless communications to inexpensive applications, from sensors and switches for industrial and residential use to smart tags and badges, interactive toys, inventory...
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The Book End

Analog and Digital Filter Design, Second Edition Steve Winder Newnes 450 pages, paperback; $59.99 ISBN: 0-7506-7547-0 The analog section of this book includes both passive and active filter designs, while the digital section covers infinite impulse response (IIR) and finite impulse response (FIR) filter design. Detailed circuit theory and...
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High Performance UMTS Circulators and Isolators

The data rate evolution necessary to meet new mobile telecommunication standards (9.6 kb/s for GSM, 115.2 kb/s for GPRS, 384 kb/s for EDGE and 2 Mb/s for UMTS) demands the use of wider bandwidth and bandwidth-efficient linear modulation techniques. Therefore, telecommunication manufacturers require improved specifications for 3G standards. In...
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Design and Evaluation of a High Selectivity Combline Bandpass Filter

Quasi-planar combline bandpass filters have been realized in suspended substrate stripline. The coupling between non-adjacent resonators and the composite effect of N quasi-TEM modes excited from N-coupled lines are considered. The design approach is b...
Advances in MIC and MMIC technology have motivated the demand for compact, high performance filters, diplexers and multiplexers used in microwave receiver systems. Combline bandpass filters have been in great demand because of their structural compactness and excellent wide stop-band performance. They are easy to fabricate in printed circuit...
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An Equivalent Circuit and Modeling Method for Defected Ground Structure and Its Application to the Design of Microwave Circuits

In this article, the equivalent circuit and modeling method for a defected ground structure (DGS) is proposed, to be used in the design of a microwave circuit. Using the proposed equivalent circuit permits the optimization of the DGS circuits. Simulati...
Recently, there has been an increasing interest in studying microstrip lines with various periodic structures that prohibit wave propagation in certain frequency bands, including photonic bandgap (PBG) and DGS. 1-10 Each periodic structure has its own properties and advantages. DGS, which is realized by etching only a few areas...
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A Diode Linearizer for Microwave Power Amplifiers

The performance of communication systems, in both space and ground segments, is degraded by the nonlinearity of the power amplifiers that are operated in saturation to obtain higher efficiency. Linearizing is the technique used to improve the performance of communication systems when power amplifiers are operated in saturation. The...
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