TX antenna - 4SQ-8DIR NEW 8 directions 4SQ antenna

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!! With 2-port VNA or Spectrum Analyser with TG ** Very nice way how to SEE antenna parameters is with VNA or SA ** Connect TX and RX port with short cable and do calibration ** Than connect TX port of VNA (TG on SA) to the IN port of hybrid ** RX port of VNA (IN of SA) connect to Dummy LOAD port on hybrid ** Connect all antenna elements ** Connect controller ** Now you cas see S21 parameters of antenna ** This will change with direction switching ** You can see the minimum of S21 what is the best SWR of antenna ** Frequency where there is that minimum, there is best SWR of antenna ** For example S21 = -20dB means 1/100 of Input power to dummy load ** On right tunned elements you can have more than -30dB ! what is 1W from 1kW !!! * [bigger picture|https://remoteqth.com/img/ZAW-WIKI/4sq-8dir/with_vna_940.png] [https://remoteqth.com/img/ZAW-WIKI/4sq-8dir/with_vna_850.png|noborder] - Return loss (RL) in dB to SWR: ONLINE calculator [RL to SWR|https://cgi.www.telestrian.co.uk/cgi-bin/www.telestrian.co.uk/vswr.pl] [https://remoteqth.com/img/ZAW-WIKI/4sq-8dir/swr1kw.png]
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