30.05.2013, 01:15 PM
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Quelle: Funkamateur 08/2010
Quelle: Funkamateur 08/2010
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Zitat:Original geschrieben von Rumgucker
Was messen wir eigentlich genau wenn wir "elektromagnetische Wechselfelder" erfassen wollen......
Zitat:A whip antenna of 100 cm is an half-wave antenna on 2m, where voltage and current assume different values along the length of the whip. At a wavelength of 2200 meters, the 137 KHz amateur band, this antenna behaves completely different. At 137 KHz the whip is a capacity that receives signals from coupling to the electric field.
If we accept that a whip antenna is a capacity coupled to the electric field, the form is no longer important. The antenna works as long as it has enough capacity.