File:SatelliteAntenna-137MHz closeup.jpg
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Size of this preview: 463 × 599 pixels. Other resolutions: 185 × 239 pixels | 490 × 634 pixels.
Original file (490 × 634 pixels, file size: 66 KB, MIME type: image/jpeg)
Summary
| Description |
English: A turnstile antenna used for reception of weather satellite data on 137 MHz. It consists of two identical dipole antennas at right angles, fed in quadrature. This type of antenna is used because it receives circularly polarized radio waves transmitted by the satellite. Circular polarization is used for satellite communication because it is insensitive to the relative orientation of the transmitting and receiving antenna elements. Français : Une antenne tourniquet utilisée pour la réception des données météorologiques par satellite de la bande: 137 MHz 138 MHz. Elle ce compose de deux antennes dipôles identiques à angle droit, alimentées en quadrature. Ce type d'antenne est utilisé parce qu'il reçoit en polarisation circulairement les ondes radio transmises par le satellite. La polarisation circulaire est utilisé pour les communications par satellite car elle est insensible à l'orientation relative de transmission et la réception par les éléments d'antenne. Alterations to original image: cropped out portions of empty sky to give closeup view, increased contrast. |
| Date | |
| Source | Derived from SatelliteAntenna-137MHz.jpg |
| Author | |
| Other versions | SatelliteAntenna-137MHz.jpg |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:19, 22 June 2015 | | 490 × 634 (66 KB) | wikimediacommons>Chetvorno | User created page with UploadWizard |
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