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October 31st 08, 12:33 PM
posted to rec.radio.amateur.antenna
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What's the Impulse response of a loop and dipole antenna?
Scott Stephens wrote:
Since antennas have reactance and radiation resistance, ... It might help to note that the antenna feedpoint impedance is a virtual impedance - a ratio of total voltage to total current. A dipole is a standing wave antenna with a feedpoint impedance of: Zfp = (Vfor+Vref)/(Ifor+Iref) [all phasors] This type of impedance is covered by the (B) definition of "impedance" in "The IEEE Dictionary". It is not the same thing as an "impedor" which is covered by the (C) definition of "impedance". -- 73, Cecil http://www.w5dxp.com |
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