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January 2010 [Components] Match Loop Antennas Via Mutual Inductance Loop antennas are widely used in small wireless products, particularly for UHF bands between 300 and 1000 MHz. They are small in size relative to wavelength, independent from a ground plane, and relatively immune to the influence of nearby objects. They are also easily implemented in printedcircuit form with corresponding low cost. But their low radiation resistance makes them difficult to match and subject to low efficiency. They exhibit high... December 2007 [Feedback] No Apology Necessary In the "FEEDBACK" column of October ("Breaking The Hatred Cycle," October 2007, p. 13), while referring to Jack Browne's article "The War Against IEDs" (improvised explosive devices) in Penton's Military Electronics, September 2007, John Evans expresses his opinion that social and cultural issues have nothing to do with the motives of Islamic terrorists. Indeed, he shows that these terrorists have been killing non-Muslims for... |
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