Biquad antenna (parametric)
thingiverse
Nice design by Andrew McNeil: https://www.youtube.com/watch?v=4t6OliwhJ5g Open the SCAD file to tune parameters. Cable length (squares) is computed from frequency. The OpenSCAD console prints information to finalize the antenna. For example, with a frequency of 2430 MHz, you'll see: ECHO: " Diamond (one of the 4) total length: ", 123.371 ECHO: " Diamond side (1/4 length): ", 30.8428 Always check your build (continuity, ...) BEFORE connecting a new antenna to your TX/RX!
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