File:Kreuzdipolarp.jpg
From Vigyanwiki
Size of this preview: 431 × 600 pixels. Other resolutions: 172 × 240 pixels | 592 × 824 pixels.
Original file (592 × 824 pixels, file size: 143 KB, MIME type: image/jpeg)
Summary
| Description |
English: Yagi turnstile antenna array for reception of weather satellite signals on 137-138 MHz at the European Space Agency (ESA) Redu satellite communication station near the village of Redu, Belgium, 1969-2003. In this frequency range satellites transmit signals in circular polarization so that the signal can be received regardless of relative antenna orientation, necessitating a circularly polarized ground antenna. Each of the six components of the array consists of two 9 element Yagi antennas mounted at right angles on the same axis and fed with a 90° phase difference, creating a circularly-polarized beam of radio waves.
Français : tableau d'antennes Yagi tourniquet pour la réception des signaux dans la bande 137-138 MHz des satellites météorologiques à l' Agence spatiale européenne (ESA) à proximité du village de Redu en Belgique, 1969-2003. Dans cette gamme de fréquences les satellites émettent des signaux en polarisation circulaire de sorte que le signal peut être reçu indépendamment du rapport de dépolarisation des antennes, nécessite une antenne de sol en polarisation circulaire. Chacun des six composants de la matrice est constituée de deux éléments 9 antennes Yagi monté à angle droit sur le même axe et alimenté avec une différence de phase de 90°,crée un faisceau à polarisation circulaire des ondes radio. |
| Source | Self-photographed |
| Author | Dantor |
Licensing
I, the copyright holder of this work, hereby publish it under the following licence:
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic licence.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:38, 30 September 2006 | | 592 × 824 (143 KB) | wikimediacommons>Dantor | Cross Yagi-Antenna array for 136-138 MHz ESA Earth station Redu 1969-2003 Own photograph |
File usage
The following 2 pages use this file:
