Antenna phasing 101By: BY HAROLD KINLEY The method used to achieve antenna gain combines two or more antennas to produce an array. Redirecting or focusing the radiated electromagnetic energy... WEB SITE SHOWCASEANDREW CORP. Andrew Corp. delivers innovative and essential communications equipment and solutions that connect the world. Products focus on the entire... Call centers prepare for the worstBy: BY DOUG MOHNEY Public-safety answering points represent the heart of first-responder communications. Every emergency 911 call nationwide-whether it's made by a wired... Suppliers offer wide-ranging adviceBy: By Donny Jackson Predictably, vendors say land mobile radio dealers' best strategies will mirror their own... Product briefsBy: From staff and wire reports Handheld 7.0 GHz spectrum analyzer Anritsu recently debuted a handheld spectrum analyzer capable of measuring 802.11a, ultrawideband and WiMAX signals... AirNet lands purchase orders worth $3 millionBy: From staff and wire reports AirNet Communications Corp. announced it has received purchase orders valued at about $3 million for its AdaptaCell 4000 base stations and AirSite 3000... EFJohnson partners with contract manufacturerBy: From staff and wire reports EFJ, Inc. announced that its EFJohnson subsidiary has entered into a contract-manufacturing partnership with Dallas-based MTI. EFJ Chairman and CEO Michael... PRODUCT BRIEFSBy: From staff and wire reports Kenwood plans P25 VHF radios Kenwood Communications plans to introduce Project 25-compliant VHF portable and mobile radios. Portable handsets are slated... PRODUCT SHOWCASEANDREW CORPORATION Andrew Corporation announces three new dual duplex tower mounted amplifiers (TMAs). These easy-to-install TMAs work with any wireless... Preventing microwave interferenceBy: By Daniel Wojtkowiak, Radio Frequency Systems Wind and other environment influences play a major role in signal distortion... Product BriefsBy: From staff and wire reports Bentek intros satellite modem for remote SCADA Bentek Systems unveiled the SCADALink UNICON SAT, a satellite modem designed for SCADA applications. The... Legalities affect signal booster useBy: By Alan Tilles In searching for ways to mitigate interference at 800 MHz, much attention has been focused on the use of signal boosters, or bi-directional amplifiers... Batteries forever, fuel cells next yearBy: By Doug Mohney If it's portable and electronic, it needs batteries. One of the byproducts of the silicon revolution has been the steadily growing appetite for portable... How to give radio signals a boostBy: By Harold Kinley It's one thing to get a signal into a building, another to distribute it from top to bottom... Product briefsBy: From staff and wire reports Purcell unveils modular power cabinet system Purcell Systems introduced the SiteSupport family of battery cabinets at last month's IWCE in Las Vegas.... |
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