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project:hgg:antenna_design [2012-06-18 00:00] – bXclgjbhCkDXpQz 77.79.229.62project:hgg:antenna_design [2012-06-18 01:25] (aktuell) – alte Version wieder hergestellt 46.115.42.81
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-Thank you for an excellent acitrleCurrentlyI'm in the process of changing my antenna configuration from a random wire to a dipole, inverted-vee or sloperAs mentioned in your acitrle, defining your type-of-contest is important then, matching your antenna systemMy contest focus is domestic and budget friendly wire antennas can compete against yagisI'm looking forward to adding little more gain into the KA3DRR signal from the central coast of California.+up: [[project:hgg|Project HGG]] 
 + 
 +====== Project: HGG - Antenna Design ====== 
 +  * [[project:hgg:antenna design:jpole|J-Pole]] 
 +  * [[project:hgg:antenna design:slimjim|Slim-JIM]] 
 +  * [[project:hgg:antenna_design:omidirectional|Omnidirektional]] 
 +  * [[project:hgg:antenna_design:lindenblad|Lindenblad (Omnidirectional)]] (see also: [[http://www.amsat.org/amsat/articles/w6shp/lindy.html|AMSATW6SHP: The Lindenblad]]) 
 + 
 +There's also a nice collection of [[http://www.dxzone.com/catalog/Antennas/Satellite/|satellite antenna designs at dxzone]]. 
 + 
 +====== Findings about Antenna Design ====== 
 + 
 +Random facts about antennas we found out or read aboutNeed to be put into an article and into context.  
 + 
 +===== Why is usually a 1/2 lambda antenna used? ===== 
 + 
 +Imagine a Sine waveImagine a half wavelength starting at PI/2. It goes until 3/4 * PI. That means you have the beginning where the value of the sine is max and the end where it is minimalThat means your difference is maximized. For wave - it'the same. Thus by using lambda / half antennas you can maximize the output-level.  
 + 
 +To think about: Does an antenna cause a phase shift? (I think it does).
project/hgg/antenna_design.txt · Zuletzt geändert: 2012-06-18 01:25 von 46.115.42.81