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especially when dealing with low power IoT-devices or these arduino-style radio-modules that don't come with fixed rod-like antennas but rather those cable-type antenna-tails, the length of the antenna-cable is described as a critical factor for the signal range - and is calculated by dividing the speed of light by the signal frequency. I wonder though, wouldn't the length of the pcb-trace leading towards the antenna-connector need to be included in the length-calculation as well? If not, how is it that the receiving part only begins at the antenna-connector?

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    \$\begingroup\$ Do you understand transmission line theory? If not AND you want a decent answer then start learning it. Dividing c by f usually gets you a monopole antenna length that is 4 times too big. Do some more research is my advice. It's not a simple subject. \$\endgroup\$ – Andy aka Mar 21 at 16:03
  • \$\begingroup\$ yep, you're asking "why is the transmission line to the antenna not part of the antenna", and that can only be honestly be answered with "because it's a matched transmission line and not an antenna", unless you want us to write a complete introduction to transmission line theory. \$\endgroup\$ – Marcus Müller Mar 21 at 18:03
  • \$\begingroup\$ @tobias Because you get maximum power transfer when the source impedance is matched with the load. \$\endgroup\$ – Voltage Spike Mar 26 at 4:26

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