[jhallenworld]

Is the antenna open source? Is it characterized (bandwidth, efficiency, radiation pattern)?

Almost like one from here: https://www.ti.com/lit/an/swra351a/swra351a.pdf

[gramsejr]

Yeah the antenna footprint is actually that one provided by ti. I had created a footprint from that pdf but then I found a kicad footprint somewhere that looked a little nicer than my rudimentary skills. This was my first design with an antenna and I am certainly not a good rf engineer. I'd appreciate any tips and feed back.

[anfractuosity]

I believe it's called a 'Meandered Inverted-F Antenna (MIFA) ' I used the footprint from https://github.com/prasad-dot-ws/ESP32_MIFA_PCB_ANTENNA recently, which is based on Espressif's gerbers for a sample pcb.