en:gpant
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en:gpant [2016/06/11 19:20] – kaklik | en:gpant [2019/05/03 15:28] (current) – [Antenna location] fluktuacia | ||
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====== Ground plane 1/4 lambda antenna ====== | ====== Ground plane 1/4 lambda antenna ====== | ||
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- | Disadvantage, | ||
- | [[http:// | + | 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:// | Antenna socket connector is [[http:// | ||
antenna plug is [[http:// | antenna plug is [[http:// | ||
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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. | ||
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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 west, towards the GRAVES radar where we expect the best reflections from meteor trails. |
en/gpant.txt · Last modified: 2019/05/03 15:28 by fluktuacia