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en:gpant [2016/06/11 19:24]
kaklik [Ground plane 1/4 lambda antenna]
en:gpant [2019/05/03 15:28] (current)
fluktuacia [Antenna location]
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 ====== Ground plane 1/4 lambda antenna ====== ====== Ground plane 1/4 lambda antenna ======
 +[[http://​www.ccars.org/​projects/​2mgp/​tech_2mgp.htm|GP antenna]] is composed of two main emitter parts (vertical part), radial (horizontal part) and a coaxial connector (mainly creating a mechanical support).
  
-Disadvantage,​ on the other hand, is that the radiation pattern drops sharply to zero at zenith, making it very difficult to detect meteors flying directly over the head (compared to visual observation). ​ 
  
-[[http://​www.ccars.org/​projects/​2mgp/​tech_2mgp.htm|GP antenna]] is composed of two main emitter parts (vertical part)radial (horizontal part) and coaxial connector ​(mainly creating mechanical support).+Its disadvantage i that the radiation pattern drops sharply to zero at zenithmaking it very difficult to detect meteors flying directly over the head (compared to visual observation). 
  
 +==== Construction ====
 Antenna socket connector is [[http://​rasel.cz/​www/​obrazky/​velke/​209-210.jpg|panel mount UHF connector]] and  Antenna socket connector is [[http://​rasel.cz/​www/​obrazky/​velke/​209-210.jpg|panel mount UHF connector]] and 
 antenna plug is [[http://​rasel.cz/​www/​obrazky/​velke/​209-002_001.jpg|UHF coaxial connector]]. ​ antenna plug is [[http://​rasel.cz/​www/​obrazky/​velke/​209-002_001.jpg|UHF coaxial connector]]. ​
- 
  
 {{gallery>:​cs:​antennas?​gp_plast*.jpg&​150x150&​crop&​lightbox}} {{gallery>:​cs:​antennas?​gp_plast*.jpg&​150x150&​crop&​lightbox}}
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 Active element should be placed far enough (at least 2 lambda) from any large or conductive objects such as walls of buildings, wires, railing etc.  Active element should be placed far enough (at least 2 lambda) from any large or conductive objects such as walls of buildings, wires, railing etc. 
  
-The most suitable direction of antenna radial is to the west towards the GRAVES radar where we expect the best reflections from meteor trails.+The most suitable direction of antenna radial is to the westtowards the GRAVES radar where we expect the best reflections from meteor trails.
  
  
en/gpant.1465673042.txt.gz ยท Last modified: 2016/06/11 19:24 by kaklik