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A resonant dipole antenna can be likened to a series RLC lumped constant circuit where the impedance seen across the two terminals contains zero reactance at resonance, and where operation at a frequency slightly above resonance results in an inductive reactance in the impedance, and a capacitive reactance in the impedance for frequencies slightly below ...


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Thanks to everyone who provided answers to this question, but none are completely correct, so after all this time I have answered the question myself. This image appears in the Wikipedia article for Half Wave Dipole. The voltage and current shown in the image is the actual voltage and current of the standing wave which exists along the elements of a ...


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You should definitely wrap a wire, or perhaps three wires, on the outside of the carbon mast. These could be wound in a slow spiral to stop them flapping. The efficiency will not be compromised much by having the carbon fibre in parallel with the copper wire. Make sure the feedpoint is not "shorted out" by the carbon - use an insulating bush or ...


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The total current (according to physics) across any region around the antenna is the sum of the conduction current within the elements plus (according to Maxwell's equation) the displacement current in free space. The displacement current represents the part of the current that generates any RF radiation. If you use the total current (conduction plus ...


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