ESP32-C3 SuperMini antenna modification

(peterneufeld.wordpress.com)

26 points | by ta988 8 hours ago ago

5 comments

  • bArray 2 hours ago

    Antenna design is a dark art, I like simple hacks like this.

    > The two parts of the antenna are intentionally designed to create an omnidirectional radiation pattern without a pronounced directionality.

    I worked on a project a while back to try to utilize this to detect the arrival direction of WiFi signals approximately based on received strength. Do this for enough base stations and you have a very crude positioning system.

    • Joel_Mckay 43 minutes ago

      It also immediately invalidates FCC modular component compliance, and may be illegal if operating on dual-use bands like 5G wifi.

      Remember the rules limits use the ERP, and EEs may have added a crappy antenna on purpose to meet the legal limits.

      https://en.wikipedia.org/wiki/Effective_radiated_power

      There are also medical radiofrequency exposure guidelines, and they mitigate deep tissue burns or "G5 Mind control beams" concerns. lol =3

      https://www.canada.ca/en/health-canada/services/health-risks...

      • vkdelta 36 minutes ago

        Exactly… they would have added crappy antenna as they likely meet emission, spurious or harmonics requirements..

        Engineer might be messing with other 2.4GHz devices by doing this

      • spacedoutman 19 minutes ago

        You can just ignore the FCC.

        They are completely toothless.

        • chemeril 3 minutes ago

          As an individual this is mostly true unless you're touching broadcasting proper. As a business this is absolutely not true and noncompliance is a ticking time bomb that will bankrupt you.