Differences

This shows you the differences between two versions of the page.

--- en:gpant [2016/06/11 19:20] – kaklik
+++ en:gpant [2019/05/03 15:28] (current) – [Antenna location] fluktuacia
@@ Line 1: / Line 1: @@
 ====== 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 zenith, making 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 plug is [[http://rasel.cz/www/obrazky/velke/209-002_001.jpg|UHF coaxial connector]].
-{{cs:antennas:gp_plast1.jpg?direct&300 | }}
+{{gallery>:cs:antennas?gp_plast*.jpg&150x150&crop&lightbox}}
-{{cs:antennas:gp_plast2.jpg?direct&300 | }}
-{{cs:antennas:gp_plast3.jpg?direct&300 | }}
-{{cs:antennas:gp_plast6.jpg?direct&300 | }}
-{{cs:antennas:gp_plast7.jpg?direct&300 | }}
-{{cs:antennas:gp_plast9.jpg?direct&300 | }}
-{{cs:antennas:gp_plast10.jpg?direct&300 | }}
-{{cs:antennas:gp_plast11.jpg?direct&300 | }}
-{{cs:antennas:gp_plast12.jpg?direct&300 | }}
-{{cs:antennas:gp_plast13.jpg?direct&300 | }}
-{{cs:antennas:gp_plast14.jpg?direct&300 | }}
-{{cs:antennas:gp_plast15.jpg?direct&300 | }}
 The total length of 143MHz active element is 499mm and the length of short circuited stub from RG213 is 346mm.
@@ Line 39: / Line 18: @@
 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 west, towards the GRAVES radar where we expect the best reflections from meteor trails.