AT&T Inc. agreed to acquire NextWave Wireless Inc. in a deal valued at $600 million, as the telecommunications company vies for additional wireless airwaves. As part of the purchase, AT&T will get licenses for an unused band of spectrum called Wireless Communications Service or WCS. The telecom company is also hoping to get approval from the FCC to use the new airwaves … [Read more...]
Surge Protection Devices Standard for Telecommunications
IEC 61643-21:2000+A1:2008+A2:2012 is applicable to devices for surge protection of telecommunications and signaling networks against indirect and direct effects of lightning or other transient overvoltages. The purpose of these SPDs is to protect modern electronic equipment connected to telecommunications and signaling networks with nominal system voltages up to 1 000 V … [Read more...]
IEEE Recommends Clarifying “Harmful Exposure”
The Institute of Electrical and Electronics says the ambiguity associated with the regulatory definition of radio frequency interference is an obstacle to investment and innovation. The IEEE Committee on Communications Policy advises federal regulators to refine their definition of interference and to make their related deliberations more transparent. The paper targets the … [Read more...]
Standard for Use of RF Filters
IEC 62575-2:2012 gives practical guidance on the use of RF BAW filters which are used in telecommunications, measuring equipment, radar systems and consumer products. General information, standard values and test conditions will be provided in a future IEC standard. This part of IEC 62575 includes various kinds of filter configurations, of which the operating frequency range is … [Read more...]
Fabric-over-Foam EMI Gasket Suits More Applications
Chomerics Europe, a division of Parker Hannifin, introduced a low-closure-force EMI gasket suitable for applications in the automotive, military, medical and telecommunications sectors. Rated for use in temperatures up to 125°C, Soft-Shield 3700 is a fabric-over-foam (FOF) material that employs a conductive fabric wrapped around a soft, cellular silicone foam. Available in a … [Read more...]
Band Pass Filter Chip With User Selectable Passband Frequency
Hittite Microwave Corporation introduced the HMC897, a new band pass tunable filter chip that is ideal for pre-selection in advanced communications systems, military radar, EW/ECM, SATCOM, space, industrial and medical systems. Tunable over a 9 to 19 GHz frequency range, this new, ultra-compact, varactor-tuned MMIC filter is inherently stable and has small physical size and … [Read more...]
Frog Calls Inspire Wireless Network Innovation
A team of researchers at the Polytechnic University of Catalonia were inspired by Japanese tree frogs to create a new algorithm for wireless nodes. The inspiration came from the male tree frogs’ ability to desynchronize their calls so that each call is distinct. Just as the frogs have no system of central control organizing this desychronization, a modern wireless network … [Read more...]
New Graphene Filter Design Could Make Wireless Communications More Flexible
A group of Columbia University Ph.D. candidates has developed a way to use a small sheet of graphene as a tunable resonator in a filter that is very small, low powered and easily tunable. This device could enable more versatile wireless circuits that would operate at many different frequencies while also able to integrate with existing silicon chip technology. The research … [Read more...]
New Line of Low PIM Coaxial Jumpers
Pasternack Enterprises has expanded its line of high performance, low PIM corrugated coaxial cable jumpers intended for RF communications applications that benefit from low PIM, including tower top jumpers, shelter/cabinet jumpers, antenna feed lines and 2 way land mobile radio installations. The 1/2'” corrugated coaxial jumpers are 100% RF tested for PIM and VSWR and ensure … [Read more...]
Updated Test Mobile Platform for LTE Development
Aeroflex Limited announced that it has added support for enhanced Inter Cell Interference Cancellation (eICIC) to the TM500 Test Mobile platform. Functionality for testing carrier aggregation was added to the platform earlier this year. eICIC is an enhanced inter-cell interference coordination technique specifically designed to improve the overall performance of HetNet … [Read more...]
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