Japanese electronics company TDK Corp. has released new B3267P series EPCOS MKP film capacitors for applications including passive PFC circuits and output filtering for ballasts, LED power supplies and switch-mode power supplies. According to the company, the new series of capacitors “are designed for rated voltages of 450 V DC, 520 V DC and 630 V DC and cover a capacitance … [Read more...]
MOSFETS Suited for High-Voltage Applications Requiring High Efficiency and Reliability
Alpha and Omega Semiconductor Ltd. a developer of power semiconductors and power integrated circuits, has released the the AOTF11C60 and AOTF20C60, two 600V MOSFETs with AlphaMOS™ II technology. The patent-pending AlphaMOS II technology “combines planar-like robustness and controlled switching characteristics with the low on-resistance performance of super-junction type … [Read more...]
Association for International Broadcasting Alleges China Has Increased Jamming of English-Language Radio Programs
Following last month’s accusation from the British Broadcasting Corp. (BBC) suggesting that China was blocking English-language shortwave broadcasts of the organization’s World Service radio programs, the Association for International Broadcasting (AIB) has also accused China of deliberately interfering with other English-language radio programs, including Radio Australia and … [Read more...]
Fla. Man Fined $25,000 for Illegal Interference of Prison Communication System
A Florida man has been issued a $25,000 Notice of Apparent Liability for Forfeiture (NAL) by the Federal Communications Commission (FCC) for operating an unlicensed radio transmitter and interfering with a nearby prison’s communication system. Terry L. VanVolkenburg of Cocoa, Fla. allegedly “willfully and repeatedly violated Sections 301 and 333 of the Communications Act of … [Read more...]
EMP Blasts Emitted by “Space Dust” Determined as Cause for Satellite Failure
A Stanford researcher claims to have discovered the reasoning behind why some satellites inexplicably fail without extensive or visible damage. Although impacts with large space objects in space remain a potential cause, according to aeronautics and astronautics assistant professor Sigrid Close, the most likely cause of satellite failure is impacts from fast-moving … [Read more...]
Pentagon to Allow Apple and Google Devices to Access Classified Network
The U.S. Department of Defense announced that it will open its communications networks, including its classified network, by February 2014 to mobile phones and tablet computers manufactured by Apple Inc. and Google Inc. Traditionally, the military has relied on BlackBerry devices for communication. BlackBerry currently dominates the technology field at the Pentagon with more … [Read more...]
Talking Smack….
So, I attend regular US DoD E3 meetings—aptly titled the DoD E3 Integrated Program Team (IPT) and chaired by the Defense Spectrum Office—held monthly and attended by representatives of the four services, the DoD CIO’s office, the Joint Staff and others. A majority of the discussion these days centers on spectrum activity, rather than purely E3 discussion (those days are … [Read more...]
Test and Measurement Requirements for Single-Mode Fiber, Plug-Style Fixed Attenuator Devices
From the International Electrotechnical Commission webstore: “IEC 61753-051-3: 2013 contains the minimum initial test and measurement requirements and severities [that] a fiber optic attenuator [needs to] satisfy in order to be categorized as meeting the requirements of single-mode fiber, plug-style fixed attenuator devices used in uncontrolled environments. Optical … [Read more...]
Lightning Arrestors for Lightning Protection Levels III and IV Ideal for DC Applications
Phoenix Contact, a developer of industrial electrical and electronic technology products for a wide range of industries, has released VAL-MS-T1/T2 lightning arresters for lightning protection levels III and IV. The new lightning arresters are ideal for DC applications, such as FTAA/telecom, Wi-Fi networks, photovoltaic industries or AC single and multi-phase … [Read more...]
Microsoft Announces “White Space” Protocols That Could Lead to Wireless Broadband Use of Unused Analog TV Spectrum
Researchers from Microsoft Corp. and Harvard University have announced the development of a set of protocols that could be used to design wireless products capable of accessing unused analog TV spectrum, known as “white space,” while meeting the Federal Communications Commission (FCC) requirements for avoiding interference. Though technology companies have spent several years … [Read more...]
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