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en:gpant [2016/06/11 19:20] kakliken:gpant [2019/05/03 15:27] – [Ground plane 1/4 lambda antenna] fluktuacia
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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]]. 
  
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 The total length of 143MHz active element is 499mm and the length of short circuited stub from RG213 is 346mm. The total length of 143MHz active element is 499mm and the length of short circuited stub from RG213 is 346mm.
en/gpant.txt · Last modified: 2019/05/03 15:28 by fluktuacia