Models 3180, 3181, and 3182 from ETS-Lindgren are a series of omni-directional, biconical antennas for monitoring broadband spectrum. In addition to receiving signals from every direction around the antenna axis, Models 3180 and 3182 feature optimized elements that forestall any splitting of the main radiation beam in the elevation cut. Models 3180 and 3182 cover the … [Read more...]
Rise Time vs. Bandwidth and Applications
A simple, practical mathematical model allows one to relate signal rise-time to the available bandwidth of a measurement instrument. Mekonen Buzuayene, Anritsu Corporation, Morgan Hills, Calif., USA In measurement instruments such as oscilloscopes and spectrum analyzers, the maximum rise time (tr) that can be measured with reasonable amplitude accuracy is directly related … [Read more...]
Gore Scores Prize as One of the Nation’s Best
Well-known for their EMI shielding and other products for the electronics sector, W.L. Gore has announced that it has earned a position on FORTUNE magazine’s annual list of the “100 Best Companies to Work For” for the 12th consecutive year. Gore is ranked No. 15. The full list and related stories appear in the February 2 issue of FORTUNE; it is available now on newsstands … [Read more...]
Optimal Techniques for Minimizing IR-Drop and Supply Bounce
Any multi-supply pinned microcontroller can be improved simply by altering the pin allocation Mart Coenen and Dick de Greef Phillips Applied Technologies Eindhoven, the Netherlands On-chip ir drop, ground bounce, and supply bounce are key parameters that may have a serious impact on both the functional reliability and the EMC of integrated circuits (IC). This paper presents a … [Read more...]
Silicone Filter Seals Adapt to a Wide Variety of Applications
EESeals™ from Quell, Inc. provide EMI and transient protection in a wide variety of applications. Formed from a unique silicone rubber and slightly oversized, they adapt themselves to the space where they are installed. This conformal quality maintains electrical contact for any devices within the shield. Specifically, MOVs, resistors, and other components can be added to the … [Read more...]
Capacitor Termination Can Enhance Reliability
Using a polymer termination for multilayer capacitors forestalls damage during PCB assembly Matthew Ellis For safety critical applications such as aerospace and military, failure caused by a short circuited capacitor could be disastrous. One of the most reliable components for surface mount communications is the multilayer ceramic capacitor, in which a block of ceramic … [Read more...]
EM Simulation Software Firm Announces Winners of Its 2008 Publication Awards
Computer Simulation AG, a Darmstadt, Germany, maker of software for the simulation of EM fields in all frequency bands, has announced the winners of its 2008 CST Publication Awards. Prerequisites for participation in this competition are that papers must be authored or co-authored by academic researchers, must be published in either scientific journals or conference … [Read more...]
The Importance and Methods of Full Wave Simulation Validation
Regardless of the accuracy of the modeling tool, each modeling exercise requires some level of validation before simulation results can be trusted. Bruce Archambeault, Ph.D. and Samuel Connor IBM Research Triangle Park, NC The need to validate simulations and model results has never been more vital. Full-wave and quasi-static simulation tools using many different modeling … [Read more...]
RF Microwave Manufacturer Awarded $1.4 Million Order for High Power Amplifiers for Jamming
In another story touching on the art of jamming, or purposeful interference, RF microwave manufacturer Comtech Telecommunications Corporation has announced that its Melville, NY-based subsidiary, Comtech PST Corporation, has received a $1.4 million order from a domestic prime contractor to supply broadband, solid-state, high power radio signal jamming. These amplifiers, which … [Read more...]
Texas Officials Hope to Resolve Prison Phone Jamming Controversy
As this issue of the eNews was being prepared, Texas politicians and prison authorities were trying to sort out the dilemma of jamming illegal phone calls by incarcerated felons without running afoul of the 1934 federal law that bans interference with radio signals. Earlier this year, officials in South Carolina had conducted a successful test of a jamming device that … [Read more...]
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