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#HACK WIFI ANTENNA LICENSE#
License free radio such as WiFi, Bluetooth and pretty much everything else we see here that is wireless (except amateur radio) are governed under Part15. I’m speaking of the laws here in the US but I bet most other countries work similarly. Again, I’m not saying “Don’t do this” I’m saying “Know this”. It’s just that I’ve seen enough dumb internet-comment arguments to know that we do have a lot of people here who don’t understand how antenna gain affects ERP limits and how they could (although probably won’t) receive a fine or other punishment.
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I’m not saying anyone is very likely to get into trouble. I’m not saying tell people “no, never do this”. I think with all these “hack an antenna onto a license-free radio device” articles it might be nice to warn people that they could be violating the laws of their country when they do it. The Zero 2’s antenna is slightly modified from the original Zero (based on the 3B) but geometrically it’s basically the same. Obviously there’s one direction here that’s terrible, which is if you’re staring at the back of the cavity (so you only see the “wall” of the mirror), and the worst nulls are usually just slightly off from the back lobe where you get reflections that cause further interference.
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The Pi Zero’s antenna is a resonant cavity: so it’s a “gap” (close to the edge of the PCB) where the feed point is, then a trapezoidal cavity that’s grounded at the back (to act like a mirror to ‘trap’ everything incident). It’s usually pretty easy to understand the radiation pattern just from geometry, at least to first order. ” it’s just a lot less obvious where they are unless you have a radiation pattern to look at.” Obviously you can create a virtual non-directional antenna pretty easily with coverage from multiple antennas. No such thing as a single non-directional antenna. “There’s no such thing as a non-directional antenna” Posted in Raspberry Pi, Wireless Hacks Tagged raspberry pi, Raspberry Pi Zero 2 W, u.fl, wifi, wifi antenna Post navigation Curious about the Raspberry Pi antenna’s inner workings? We’ve covered them before! If you’d like to see some previous Raspberry Pi mods, here’s one for the Pi 3, and here’s one for the original Zero W – from, too! This trick should be pretty helpful if you’re ever to put your new Pi Zero in a full-metal enclosure. A Pi Zero isn’t the only place where you’ll encounter footprints for connectors you can add, and arguably, that’s your duty as a hacker – modifying the things you work with in a way that adds functionality.
#HACK WIFI ANTENNA HOW TO#
With old laptops being a decent source of WiFi antennas, you only need to procure a u.FL connector and practice soldering a bit before you take this on! The hardest part of such a project tends to be not accidentally putting any solder on the u.FL connector’s metal can – and mostly succeeds in that! He shows how to disconnect the external antenna to avoid signal reflections and the like, and, of course, you will be expected to never power your Pi Zero on without an attached antenna afterwards, lest you have your transmitter become fatally confused by the mismatch of hardware-defined impedance expectations. His measurements show seeing fourteen networks available in a spot where he’d only see four before, and the RSSI levels reported have improved by 5 dB -10 dB, big when it comes to getting a further or more stable connection.
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This is where comes in, with a photo-rich writeup and video tutorial, embedded below, that will have you modify your own Zero in no time. Inline with the onboard WiFi antenna can be found a u.FL footprint, and you just know that someone had to add an external antenna. Having finally received his board, shows us how to boost your Pi’s WiFi, the hacker way. We’ve only started to tap into the potential of the brand new Pi Zero 2.