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Ligne 79 : − − == The game of minimum lost == − − When doing radio transmission, your devices tries to emit data over the air with electricity. − − {{dbox-orange| As you can easily figure out, the air is a very poor electric conductor! That results a significant portion of the power is lost in the air. }} − − '''The power lost is expressed in dBm''' (see [https://en.wikipedia.org/wiki/DBm dBm on wikipedia]). − − dBm provides a relatively intuitive way to express the power level/power lost of a signal. − − [[Fichier:COMMON-CANSAT-ANTENNA-minimum-lost.png]] − − {{dbox-orange| Power Lost also occurs in the antenna, the coaxial cable and the RF connector! }} − − Wrong material or poor antenna design can result is a power lost bigger than air transmission! − − The good new is that power can also be gain with a good antenna design (this usually requires some tuning).
→The game of minimum lost
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== Antenna connector ==
== Antenna connector ==