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→Quarter WaveLength Antenna
<nowiki> 3x10E8
<nowiki> 3x10E8
L = --------------- = 0.1732m
L = -------------- = 0.1732m
4 x 433*10E6 </nowiki>
4 x 433*10E6 </nowiki>
So an antenna length of 17.32 cm.
<div style="margin: 15px 0; background: rgba(204,14,14,.3); display: block; padding: 15px 15px 15px 15px; -webkit-border-radius: 2px; -moz-border-radius: 2px; border-radius: 2px; border: 1px solid #CCC;" >When using such antenna, you have to think about the polarisation of your signal, Andeas Spiess shows it into its YouTube video '[https://youtu.be/J3PBL9oLPX8 A closer look at the “black magic” of antennas, how they work, what is essential, and how to test them]'. If you miss this very simple point, you will lost lot of gain and loose data.</div>
<div style="margin: 15px 0; background: rgba(204,14,14,.3); display: block; padding: 15px 15px 15px 15px; -webkit-border-radius: 2px; -moz-border-radius: 2px; border-radius: 2px; border: 1px solid #CCC;" >When using such antenna, you have to think about the polarisation of your signal, Andeas Spiess shows it into its YouTube video '[https://youtu.be/J3PBL9oLPX8 A closer look at the “black magic” of antennas, how they work, what is essential, and how to test them]'. If you miss this very simple point, you will lost lot of gain and loose data.</div>