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30m Projects - Antennas

Click to enlargeDipolo Rotativo per 30/40 Mt da IK4DCS
Dopo aver fatto la verticale per 30/40 mt,e considerandone l'ottimo funzionamento, ho voluto riprendere il discorso del dipolo direttivo, gi visto all'inizio di questa autocostruzione.

Click to enlargeMagnetic loop by F5SWN
The magnetic loop, thus named by the use of the magnetic component of the electromagnetic field, is a parallel circuit LC. The antenna is feeded using a coupling loop or a gamma, located opposite to the capacitor.

Click to enlargeMagnetic Loop Antenna by 7N3WVM
Although a magnetic loop antenna is very compact, its efficiency is close to a half-wavelength dipole if carefully built. The key point is to make the loop element with material of low ohmic resistance.

KClick to enlargeUne antenne verticale 10/14MHz trappe coaxiale de F6GLZ
Cet article traite plutt de la manire de construire une trappe coaxiale pour une antenne verticale.

Creation date : 12/08/2007 @ 19:30
Last update : 26/09/2018 @ 18:28
Category : 30m Projects
Page read 17485 times

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