Unterschiede

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--- project:hgg:antenna_design [2012-06-17 22:00] – bXclgjbhCkDXpQz 77.79.229.62
+++ project:hgg:antenna_design [2012-06-17 23:25] (aktuell) – alte Version wieder hergestellt 46.115.42.81
@@ Zeile 1: / Zeile 1: @@
-Thank you for an excellent acitrle. Currently, I'm in the process of changing my antenna configuration from a random wire to a dipole, inverted-vee or sloper. As mentioned in your acitrle, defining your type-of-contest is important then, matching your antenna system. My contest focus is domestic and budget friendly wire antennas can compete against yagis. I'm looking forward to adding a 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|AMSAT, W6SHP: 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 about. Need to be put into an article and into context.
+===== Why is usually a 1/2 lambda antenna used? =====
+Imagine a Sine wave. Imagine 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 minimal. That means your difference is maximized. For a wave - it's 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).