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RF Micro Devices (RFMD) announced the expansion of its wireless infrastructure product portfolio with the introduction of the SPA-1426Z and SPA-1526Z power amplifiers (PA). The SPA-1426Z and SPA-1526Z are one-watt and two-watt, respectively, Indium Gallium Phosphide (InGaP) power amplifiers that address base station applications across all cellular standards and...

Analogic Corp. announced recently that it has entered into an agreement to acquire privately held Copley Controls Corp., Canton, MA, a supplier of gradient amplifiers for Magnetic Resonance Imaging (MRI) and precision motion control systems. The purchase price is approximately $68.75 M cash and up to an additional $1.8...

A four feeding microstrip antenna operating at 2.0 GHz and match to a 50Ω impedance is designed to combine the power externally in wireless communication. The antenna is designed using Agilent’s Advanced Design System (ADS) and Computer Simulation Technology (CST) simulation tools. After fabricating the antenna, the S-parameter, radiation...

This article proposes a miniaturized quarter-circular-slot UWB (QCS-UWB) antenna using field-pattern analysis of the circular-slot UWB prototype antenna. The prototype antenna operates on a series of multi-pole radiation based on TEn modes, and has a completely symmetrical and approximate symmetrical planes along the vertical and the horizontal lines, respectively,...

Introduction Orthogonal Frequency-Division Multiplexing (OFDM) — essentially identical to Coded OFDM (COFDM) — is a digital multi-carrier modulation scheme, which uses a large number of closely-spaced orthogonal sub-carriers. Each sub-carrier is modulated with a conventional modulation scheme (such as quadrature amplitude modulation) at a low symbol rate, maintaining data...

This paper outlines some of the recent advances in Fresnel zone plate antenna technology. Sidelobe reduction and control over sidelobe location are two developments, which are useful for interference reduction. Another development is the focusing resolution of Fresnel zone plate antennas for sub-wavelength focal distances. Designs will be given...

Many years ago when our grandfathers used slotted lines to analyze networks, they may have dreamed of simpler, less cumbersome instruments. Measurements with a slotted line were very time consuming, primarily due to the fact that the maximum and minimum of the standing-wave pattern and the exact distance between...

ESI Group, a provider of physics-based simulation software, announced the release of the new version of its PAM-CEM Solutions software package. This product is aimed at performing realistic and predictive electromagnetic compatibility (EMC) simulations in various industries including aerospace and defense, electronics, transportation and telecommunications. When dealing with industrial...

Published Tuesday, March 4, 2008 | Last Update 3.04.08 Here are your replies to the Febuary Expert Advice column The modern age of Vector Network Analyzers (VNA) started with the introduction of the HP 8510, in 1984. This was the first, fully integrated, fully automated VNA, and was the...

Fujitsu Telecommunications Europe Ltd. has been awarded a multi-million Euro contract to modernize an existing radio backbone for a North African customer. The company will be prime contractor, partnering with the French company, Twist, for the project that is scheduled for completion in 2009-2010. The first phase involves the...