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In recent applications of telecommunications and remote sensing at microwave frequencies, the exploitation of UWB antennas is steadily growing. 1 UWB radio can use the frequency band from 3.1 to 10.6 GHz. UWB systems also need to be compatible with other already existing standards. 2 To allow such a...

A great deal of attention has recently been paid to ultra-wideband (UWB) technologies for short-range and high data-rate wireless personal area networks (WPAN). By supporting data rates up to several hundred megabits per second (Mbps), these technologies are expected to be used in multimedia consumer electronic products in the...

A variety of commercial, governmental and military applications utilize the 4.40 to 4.99 GHz band. In the US and NATO countries, the 4.4 to 4.5 GHz band is designated for military fixed and mobile communications such as point-to-point microwave links and telemetry applications such as unmanned aerial vehicles (UAV),...

Highly efficient monolithic power amplifiers, such as those operating under switching-mode conditions, that is class-E, -F, are suitable for the realization of large-scale phased-array radar systems. 1 In these systems, the number of radiators can easily reach 100,000 or more. Such large-scale arrays are ideal for applications in space...

Until recently, conventional commercial antennas in the worldwide market have been external ones, because they provide omni-directional radiation patterns for optimum coverage in all circumstances. In addition, stubby antennas are shorter, more robust and, arguably, more aesthetically appealing than the retractable antenna. Most of the stubby antennas reported are...

The practical application of an electromagnetic bandgap (EBG) structure usually presents difficulties in accommodating its physical size, since the period of an EBG lattice has to be a half-wavelength at the stop-band center frequency. Simple increments of the EBG cells and the wave impedance difference will result in inherent...

Browse through the articles and advertisements in any issue of Microwave Journal (MWJ) and you get a pretty good glimpse of the ecosystem that forms our industry. The component manufacturers (active and passive), the integrated circuit developers, the foundries that produce these MMICs and RFICs, the test and measurement...

Handheld Cable and Antenna Tester This handheld, easy-to-use, battery-operated cable and antenna tester is designed for field engineers and technicians. The Agilent N9330A is a cost-effective test instrument that provides optimized usability and basic performance. Covering 25 MHz to 4 GHz, this instrument is an ideal choice for installation...

Orange Book of Knowledge The AR “Orange Book of Knowledge” contains articles and application notes on a wide range of topics and applications—from the importance of mismatch capability to testing beyond specs and everything in between. The book represents the cumulative knowledge of all AR companies, making it perhaps...

Engineering Your Retirement Mike Golio IEEE Press • 223 pages; $34.95 ISBN: 978-0-471-77616-1 This book should be of interest to anyone looking forward to retiring comfortably on one’s own schedule. It is the result of the author’s research as well as countless discussions with technical professional retirees. It addresses...