Re:OpenWrt in a WiFi card reader (2017)
by samfisher83 on Tuesday January 23, 2018 @09:26AM
(#16213726)
The main issue would be the antenna. Wifi's wavelength is 12cm.
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There are very small wifi antennas out there. One of my favorites is a 3mmx4mm cube:http://www.molex.com/molex/products/datasheet.jsp?part=activ...
.. which means that a quarter-wave antenna is 3cm, which looks like the metal thing just visible at top right of the PCB extending behind it.
There are loads of devices with tiny WiFi antennae that work fine.
Correct, better photo: https://www.hackup.net/wp-content/gallery/zsun-wifi-2/zsun13...