By Tim Carey, Aeroflex Test Solutions Non-cellular technologies are increasingly being integrated into cellular terminals, and this has generated the need for test systems that comprise a number of different test platforms, which can make system integration both complex and costly. At the same time, there is pressure to increase test speed and, in combination with the proliferation of functional tests associated with the introduction of new standards, this further increases the costs.
By Thomas Dippon, Agilent Technologies When testing wideband RF components and systems, it is necessary to stimulate the device under test (DUT) with a wideband signal that is as close to the “real” signal as possible. For some measurements, wideband noise or a multi-tone signal might be appropriate.
By Byron Henderson, Mesh Dynamics Smart Grid networks are currently receiving tremendous government attention and funding. The US Department of Energy says the Smart Grid "would integrate advanced functions into the nation's electric grid to enhance reliability, efficiency, and security, and would also contribute to the climate change strategic goal of reducing carbon emissions.
By Kerry Johnson, QNX Software Systems Already, vehicle telematics services have been deployed in tens of millions of automobiles. Nonetheless, mobile services offered on smart phones and other consumer devices are growing at a far greater pace. A quick survey of these mobile services reveals that many offer significant utility to drivers or passengers; in fact, some are designed specifically for in-vehicle use.
By Chris Keeser, Cypress Semiconductor Corp. The other day I was driving to the local dump to drop off a load of trash carefully stacked into the back of the family minivan. Suddenly I noticed that the “trunk open” light came on. I quickly pulled over just as the rear hatch popped all the way open and the van began to empty my garbage bags all over the road.
By Joe Cozzarelli, ANADIGICS As mobile carriers and network operators transition to 4G service, they are faced with several challenges, including the massive amount of smartphones available in the market, the volume of data traffic per phone that is rising exponentially, and all the steps required to deploy and upgrade their network infrastructures.
The growth of features available in mobile phones has both driven and been enabled by changes in NAND based memory architectures. As phone capabilities evolved, feature rich phones migrated from NOR-based solutions to NAND-based solutions. Today, with the growth of GB1 (Gigabyte) class phones, a variety of NAND-based architecture solutions are available with various tradeoffs to consider.
Dr. Robin Tichy, Micro Power Electronics Li-ion cells come in three basic form factors: cylindrical, prismatic (rectangular brick shape) and the flat Lithium polymer cells. Lithium polymer cells, sometimes called laminate cells, are available in custom footprint size. They can be very thin or quite large depending on their intended use.
Third- and fourth-generation wireless base stations that use today’s most-common interface standards, such as WCDMA, TD-SCDMA, LTE, TD-LTE and Wimax, require a large amount of signal processing to keep up with the uplink and downlink bandwidth requirements.
Last December, the Bluetooth Special Interest Group (SIG) announced in a statement that it had adopted Bluetooth low energy wireless technology and that the much anticipated ultra-low power (ULP) form of the popular wireless technology, would be the hallmark feature of the Bluetooth Core Specification Version 4.
By Chris Desalvo, Agilent Technologies Commercially available RF transmitters in the ever-evolving wireless communications technology give SIGINT and COMINT mission managers a most difficult task. They need to detect traditional push-to-talk signals, wideband digital communications, and always be thinking of future threats.
Wireless systems are now fully mainstream in our lives, not only in the consumer world of cell phones, Wi-Fi enabled laptops and satellite television, but also in the mission and life critical world of aerospace and defense. Recent applications such as ADS-B (Automatic Dependant Surveillance - Broadcast) managed commercial airline flight, software defined radios, and UAVs (unmanned aerial vehicles) bristling with sensors, all depend heavily on the electromagnetic spectrum to interact with the world, demand the highest in reliability, and are driving new and innovative solutions relative to electrical interconnect.
Mukesh Kumar, Texas Instruments The military electronics industry, which includes mission critical products, has always had quality as its ultimate objective. It was a widely held belief that the military’s computers, communications systems and all things electronic had to be a step or two ahead of everyone else’s systems.
Simon Whittle, Nujira Ltd. The new generation of data-oriented digital communications networks being rolled out in the cellular, broadcast, military and other environments carries a sting in the tail for RF designers. In order to achieve high data rates, these new standards use advanced modulation techniques such as OFDM which significantly increase the variations in amplitude of the transmitted signal.
To overcome the ever increasing end-user performance requirements of mobile devices, new multi antenna devices are being developed utilizing the recent advances in Multiple-Input Multiple-Output (MIMO) techniques, such as transmit diversity and spatial multiplexing introduced e.g. in IEEE802.16 standard.
By Graham Celine, Azimuth Systems The marketing battle between WiMAX and LTE is raging in an effort to declare which is the best solution, and vendors and service providers are racing to put stakes in the ground to claim the first or most predominant network delivering wireline speeds. However, the true challenge still lurks in the background and has yet to raise its head: which technology will work better, which will provide more throughput, which will offer better range and which will deliver more flexible mobility? The ability to put each of these technologies through their paces and comprehensively test and benchmark the performance of the network is pivotal to the success of either technology’s rollout.
Evergreen Solar, Inc., a manufacturer of String Ribbon™ solar panels with its proprietary silicon wafer technology, recently unveiled its upcoming line of higher efficiency solar panels featuring its newly developed BOOST™ Cell Technology, at Intersolar 2010 in Munich, Germany. The new ES-D and ES-E series of panels for residential and commercial markets feature Evergreen’s new Boost cell technology that uses micro wires instead of conventional bus-bars to reduce cell shading, improve current collection and ultimately increase the overall panel efficiency.
Siemens Energy and Prysmian Powerlink will connect two North Sea offshore wind farms to the German grid using a high voltage direct current (HVDC) link for transpower. The order awarded to the BorWin2 consortium is worth more than €500 millio. The Veja Mate and Global Tech 1 offshore wind farms, which will have a combined power generating capacity of 800 MW, will be connected to the grid via a submarine cable link carrying HVDC.
National Semiconductor Corp. recently announced that it has reached new deals related to its SolarMagic technology with Green Energy Solar (GESolar) and QC Solar. SolarMagic monitors and maximizes the energy harvest of each individual PV panel through a combination of advanced algorithms and leading-edge mixed-signal technology.
Following a record-breaking year of capacity additions in 2009 - with 9.8 GW of wind projects installed - the US wind market finds itself confronting a growth-constrained 2010 and a near-term market landscape wrought with increased competition, according to a new market study, US Wind Power Markets and Strategies: 2010-2025 from IHS Emerging Energy Research.
WASHINGTON- The U.S. Environmental Protection Agency (EPA) is recognizing three universities with the Combined Heat and Power (CHP) awards for generating power and thermal energy while saving energy, lowering greenhouse gas emissions and decreasing air pollution, which can reduce impacts on the public’s health.
Washington, D.C., -- A new energy bill introduced by Sen. Richard Lugar (R-Ind) wisely uses energy efficiency as the core of its provisions, the Alliance to Save Energy said today. The Lugar Practical Energy and Climate Plan focuses on money-saving efficiency policies designed to create long-term energy savings for cars and trucks, new buildings and appliances, existing homes and commercial buildings and industry.
DEVENS, Mass.,(BUSINESS WIRE) -- American Superconductor Corporation, a global power technologies company, announces in conjunction with Global Wind Day 2010 that it has achieved a significant milestone by supporting the production of more than 15,000 megawatts (MW) of wind power worldwide with its proprietary power electronic solutions.
By Ray Chadwick, Berkeley Varitronics Systems, Inc. WiMAX signals suffer from the effects of multipath and exhibit broadband fading characteristics that are very apparent in the spectrum of the received WiMAX signal (see Figure 1). It’s not a trick; OFDM modulation does not eliminate fading and is not always received with a flat spectrum.
By Keith Anderson, Agilent Technologies click to enlarge Figure 1. NVNA block diagram. High-power RF amplifiers are used in telecommunications, biomedical, and military systems. With output power levels ranging up to 1kW, these amplifiers are typically designed to operate near or into compression in order to provide the maximum output power possible.