The Sensor Network Museumtm - Antennas

Even if antennas are rated fully weatherproof, often the joint to the coaxial connector is not. An additional silicon sealing improves the situation a bit.

2.4 GHz Antennas - Tmote Sky

Hyperlinktech external antenna HG2407RD-SM

Moteiv has documentation about this on their website:

868 MHz Antennas - Tinynode

Antenna Factor ANT-868-CW-QW Datasheet [pdf]

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