Bolidozor wiki

You've loaded an old revision of the document! If you save it, you will create a new version with this data.

====== Ground plane 1/4 lambda antenna ======

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).

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]].

The total length of 143MHz active element is 499mm and the length of short circuited stub from RG213 is 346mm.

==== Antenna location ====

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.

Please fill all the letters into the box to prove you're human. D Q W E W Please keep this field empty:

Edit summary

Note: By editing this page you agree to license your content under the following license: GNU Free Documentation License 1.3