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en:hardware:antennas:h-field:ferrite-rod [2018/08/25 20:41]
gerbold
en:hardware:antennas:h-field:ferrite-rod [2020/05/09 18:25] (current)
gerbold [Ferrite Rod Antennas]
Line 35: Line 35:
 Should be mounted at right angles - cross or L-form\\ Should be mounted at right angles - cross or L-form\\
 Electrical shielding is rarely needed as connecting to pre-amplifier is differential,​ and common mode signals are attenuated strongly.\\ Electrical shielding is rarely needed as connecting to pre-amplifier is differential,​ and common mode signals are attenuated strongly.\\
-We normally use 2, but BLUE allows for an extra - could be a vertical.+We normally use 2, but BLUE allows for an extra<​del> ​- could be a vertical</​del>​. 
 + 
 +Comment from Egon on vertical antennas: 
 +//We have implemented three H-field channels to make experiments. Initially, in addition to the two horizontal antennas offset by 90 degrees, we connected a third vertical H-field antenna. We wanted to know if this results into better reception characteristics. This has not been confirmed. The interference signals at the vertical channel are much stronger than the lightning signals. So it makes no sense to position a third vertical antenna in addition to the two horizontal antennas. The detector would work almost permanently in interference mode. If you want to use the third channel, then please also use it as a horizontal channel, for example, with three antennas offset by 60 degrees, or to make experiments.//​ 
 + 
 +{{:​en:​hardware:​antennas:​h-field:​ferrite_rod_xyz.jpg?​800|}} {{:​en:​hardware:​antennas:​h-field:​ferrite_rod_delta.jpg?​400|}}
  
-{{:​en:​hardware:​antennas:​h-field:​ferrite_rod_xyz.jpg?​800|}} 
  
 ===== Shielding ferrite rod antennas ===== ===== Shielding ferrite rod antennas =====