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209 octets ajoutés ,  4 novembre 2018 à 15:59
Ligne 153 : Ligne 153 :  
Depending on the antenna, there is some rejection of the signal back to the transceiver. This means than a portion of the signal is not emitted to the air! This is why the SWR measurement is done.
 
Depending on the antenna, there is some rejection of the signal back to the transceiver. This means than a portion of the signal is not emitted to the air! This is why the SWR measurement is done.
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A poor antenna design will have greater SWR (>2) meaning that range of transmission (or reception) will be reduced! Very bad SWR may even dammage the transceiver!
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A poor antenna design will have greater SWR (>2) meaning that range of transmission (or reception) will be reduced! Very bad SWR may even damage the transceiver!
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The worse case is when there is no antenna, in this case, the rejection ratio is 100%. Nothing is emitted to the atmosphere and all the signal is send back to the transceiver (which may possibly destroy it! 
    
    
 
    
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