RF & Microwave Industry News

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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...

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...

In recent years the VXIbus architecture has proven to be a versatile interface standard for instruments from many diverse manufacturers to operate within the same mainframe. The VXIbus incorporates the user-friendly features of instruments designed to operate within the General Purpose Interface Bus (GPIB) (for example, using ASCII-level programming)...

Matching microwave to components within a circuit has become more challenging for the circuit designer as operating frequencies and circuit complexity increase. Increasing use of thick film and thin film resistors as 50 terminations has answered the increased need for microwave circuit components in various wireless and telcom applications....

Wireless infrastructure designers must often contend with conflicting goals when developing new equipment for the base transceiver station (BTS) market. The components used in today's systems are frequently required to operate over multiple bands and under multiple modulation formats. The quest for higher performance, lower cost, component interchangeability and...

A family of Ultra-low ESR products has been introduced that set a new standard for low loss microwave performance. The equivalent series resistance (ESR) is half that of previous products. The series, designated UL (Ultra-low), is currently available in both 0603 and 0505 case sizes with addition parts to...

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...

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...

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...

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...