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[[Fichier:COMMON-CANSAT-ANTENNA-10.jpg]]
 
[[Fichier:COMMON-CANSAT-ANTENNA-10.jpg]]
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* 23 watts cover 24 milliard of Km.
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* 23 watts covers 24 milliard of Km.
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* 1 watt cover 1.04 milliard of Km.
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* 1 watt covers 1.04 milliard of Km.
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* 0.1 watt cover 100 million of Km.  
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* 0.1 watt covers 100 million of Km.  
    
A RFM69 radio module at 20 dBm have an emitting power of 0.1 watt (100 mW).
 
A RFM69 radio module at 20 dBm have an emitting power of 0.1 watt (100 mW).
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