Looking at various ARA prototype pictures I noticed they all seem to feature pluggable connectors.

Sadly I could not find out which ones. Can anyone make heads or tails of this picture? enter image description here


Those are SMA connectors, perhaps the most common 50 ohm coaxial rf connector these days. Two variants exist: SMA and RP-SMA. The former has the center pin on the cable, while the latter has it on the PCB/chassis end:

The FCC wanted to prevent consumers from using third party antennas on WiFi equipment, so they designed a functionally identical yet incompatible connector (RP-SMA) so that consumers wouldn't have a choice. This of course backfired immediately (China exists), and both types are readily available.

  • \$\begingroup\$ Yes, some subway system replaced their Edison screw base lighting with left handed threaded bases to prevent pilferage. I expect they lost a few left handed fittings and the bulb pilferage continued at a lower level. \$\endgroup\$ – KalleMP Oct 9 '16 at 19:34

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