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The Book End Transmission Lines and Wave Propagation P.C. Magnusson, G.C. Alexander, V.K. Tripathi and A. Weisshaar CRC Press LLC 519 pages; $89.95, £59.99 ISBN: 0-8493-0269-2 This is the fourth edition of this book. To electrical engineers, a transmission line is a distributed parameter physical system, one in which...

Product Feature A Hardware Multichannel Simulator for Wideband Wireless Systems Elektrobit Kauniainen, Finland Hardware-based multipath fading simulators have traditionally been used to generate up to two simultaneous fading channels. Mobile network testing and future wireless applications like geolocation, smart antennas and multiple input multiple output (MIMO) systems, however, require...

Product Feature Stainless Steel Coaxial Cable with Medium Loss at 36 GHz Fig. 1 Loss per 100 ft. vs. frequency. Anyone who has tried to use copper cable for high frequency connections in high stress environments knows that it does not hold up very well for long. Attempts to...

Technical Feature A Broadband, Four-bit, Ka-band MMIC Phase Shifter A compact, robust and broadband, four-bit, Ka-band phase shifter was designed and fabricated in a standard 0.25 m m PHEMT GaAs process. Design trade-offs, simulation versus measured results and architectures for the various bits to achieve broadband performance are discussed....

Technical Feature A High Efficiency, Low Cost Silicon Bipolar GSM Dual-band PA Module T. Johansson, P. Lundin, J. Engvall and D. Uggla Ericsson Microelectronics AB Kista, Sweden U. Hagström Ericsson Microwave Systems AB Mölndal, Sweden As the wireless communication business continues to expand, there is great demand for reducing...

Editorial Index ANTENNAS Clarke, Roger "A High Efficiency Bow-tie Antenna for Impulse Propagation," No. 8, p. 94. González, V., J.M. Rodríguez, J.E. González, C. Rueda and C. Martín Pascual "Design Methodology for High Efficiency Active Radiators," No. 9, p. 168. McCarrick, Charles D. "A Combination Monopole/Quadrifilar Helix Antenna for...

The Book End Nano- and Microelectromechanical Systems Sergey E. Lyshevski CRC Press 338 pages; $89.95, £34.99 ISBN: 0-8493-916-6 This book is designed for a one-semester course on nanoelectromechanical and microelectromechanical systems (NEMS and MEMS). It builds the theoretical foundation needed to develop, analyze and prototype NEMS and MEMS, their...

Product Feature Phase Invariant Attenuators G.T. Microwave Inc. Randolph, NJ The function of a phase invariant attenuator is to change the amplitude in the processing of a microwave signal with minimal impact to the phase characteristic. The theory of operation is that when a signal reaches its maximum attenuation,...

Cover Story Electronically Tunable Thin Film Filters for Microwave Applications Paratek Microwave Inc. Columbia, MD Interference in wireless systems increases bit error rate (BER) and decreases the reliability and quality of service of the communication network. Interference mitigation requires filtering of the transmitted and received energies to reject all...

Technical Feature Dual Mode Broadband Hybrids: Theory and Experiment Alex D. Lapidus Microwave Communications Company International Inc. Valencia, CA A theoretical approach to both side and top wall (hybrid) couplers based on strong experimental work is developed. Broadband operation, related to dual mode propagation through the coupling section, is...