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With the telecom industry apparently emerging from the abyss in which it has resided for the past couple of years, In-Stat/MDR is cautiously optimistic with regards to the market for MEMS-based components in optical networks. The high tech market research firm reports that 2003 ended surprisingly strong for this...

Channels, Propagation and Antennas for Mobile Communications Rodney Vaughan and Jorgen Bach Andersen The Institution of Electrical Engineers 784 pages; $145, £89 ISBN: 0-85296-084-0 This book introduces the principles, theory and applications of physical layer wireless/mobile communications where antennas, propagation and the radio channel used are interrelated. It offers...

With numerous lucrative applications envisaged, the ZigBee Alliance is developing a standard-based wireless network platform, optimized for wireless monitoring and control applications, ensuring interoperability between products using the same application profile. The IEEE 802.15.4 standard, ratified in May 2003, specifies the physical (PHY) and medium access control (MAC) layers,...

V.J. Wilson anxiously awaits the return of his prototype of a factory automation wireless link. He has thoroughly — he believes — analyzed his entire design. With a carefully crafted spreadsheet, he defined a system architecture and passed specifications on to the circuit designers. The design team completed block...

How much automation are current electronic design automation (EDA) tools providing? While the RF computer aided engineering (CAE) industry has a lot to offer in the way of automated circuit and system analysis, what about automated circuit synthesis? The circuit design project that starts with one of the typical...

The development of short-range wireless systems has captured the industry’s imagination for several decades. 1 Many of these systems operate at the internationally available unlicensed industrial, scientific and medical (ISM) 2.4 GHz frequency band. The attraction of these systems is that they can offer low cost, small physical size...

There is a requirement for low profile and lightweight antennas for microwave communications equipment. According to these requirements a microstrip antenna is best suited. Microstrip antennas have a conformal structure, are low cost and easy to integrate with solid-state devices, as well as low profile and lightweight. However, microstrip...

There has been a dramatic increase in the worldwide use of radio frequency (RF) technologies in the last two decades, especially in personal communications. In fact, since the introduction of commercial systems in 1983, cellular telephone service has been one of the fastest growing segments of the US telecommunications...

Radio-frequency (RF) circuit design has become more complicated as today’s products and technologies have evolved, while at the same time the required design cycle times have been reduced. This presents problems for designers using traditional RF and microwave design techniques, which utilize similar procedures whether done with simulation software...

Mobile telecommunication devices continue to add functionality and complexity particularly in regards to the trend of integrating more wireless bands such as GSM, E-GSM, CDMA, W-CDMA, DCS and PCS. This trend has increased the complexity of the transmit/receive and diversity antenna switch components resulting in a migration away from...