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Antennas

Rohde & Schwarz: dynamic growth worldwide

With a turnover of € 1.3 billion, Rohde & Schwarz achieved a nearly 18 percent increase in fiscal year 2005/2006 compared with the previous year. The electronics company thus continues its success story.
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Fully integrated signal analysis for mobile WiMAX

The new R&S FSQ-K93 option for the R&S FSQ high-end signal analyzer from Rohde & Schwarz now provides manufacturers of WiMAX equipment with a fully integrated solution for measuring WiMAX OFDMA signals.
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Agilent Media Alert: Free Webcast on Medalist Bead Probe Technology

Agilent Technologies offers free webcast on Medalist Bead Probe Technology. A Simple and Proven Test Solution for Limited Access PCBs.
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Agilent News: Industry's First Oscilloscope-Based DDR2 Compliance Test Application

Agilent Technologies Introduces Industry's First Oscilloscope-Based DDR2 Compliance Test Application
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M/A-COM JOINS MULTIMEDIA OVER COAX ALLIANCE (MoCA®

Alliance Membership will Supplement M/A-COM's End-to-End Coaxial Cable Offerings
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Characterization of Ultra-wideband Bow-tie Antennas for Ground Penetrating Radar Systems

In this article, two ultra-wideband (UWB) bow-tie antennas, designed for ground penetrating radar (GPR) applications, are characterized by both numerical analysis and experimental measurements. The geometry and the different materials of the feed and t...
In recent applications of telecommunications and remote sensing at radio, microwave and terahertz frequencies, the exploitation of ultra-wideband (UWB) antennas is growing steadily. 1 In subsurface prospecting, for example, they can provide higher imaging resolution and better target characterization. 2 The design and analysis of such high performance antennas...
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An Actively-controlled Microwave Reflecting Surface with Binary-pattern Modulation

This article describes an actively-controlled reflecting surface, capable of modulating the microwave energy incident upon it. The surface is a composite structure holding an array of conventional semiconductor diodes excited with a set of pulses in a ...
For specific applications, there is a need for materials or composite structures which can reflect and/or absorb the electromagnetic (EM) energy incident upon them in a desired or controllable fashion. Such reflective EM absorbing/reflecting materials 1-3 are useful in designing smart radar cross-section (smart RCS) surfaces and radio frequency...
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Flash in the Plan

Directed-energy weapons remain more experimental than available.
The detonation by the United States of a nuclear warhead 30,000 feet above Johnston Atoll in July 1962 lit up the night sky above the Hawaiian Islands, 800 miles away. It also created a power surge that shut down the streetlights and phone system of Oahu as well as...
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A Compact Dual-band Antenna for WLAN Applications

In the world of portable electronics, antennas are problematic. They need to be small, light weight and possess the ability to perform well in a variety of conditions. It also helps if they can be neatly integrated into the product without protrusions that can be easily damaged or broken...
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Application of GTEM Cells to Wireless Communication Transceiver Designs

The GTEM cell has been widely accepted as a sufficient tool in electromagnetic compatibility for both radiated susceptibility tests and radiated emission tests. In this article, the relationships among basic quantities such as input power, electric fie...
The gigahertz transverse electromagnetic mode (GTEM) cell was first proposed in 1987 1 and subsequently patented in 1989 by D. Konigstein and D. Hansen 2 as a high frequency variant of the transverse electromagnetic mode (TEM) cell, which is also known as the Crawford cell. 3 The GTEM cell...
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