This compact 2.4 GHz Omni-directional "Rubber-Duck" WiFi antenna provides broad coverage and 2 dBi gain. It is a coaxial sleeve design with an Omni-directional pattern. It is ideally suited for IEEE 802.11b and 802.11g wireless LANs, Bluetooth® and other WLAN applications.
Only 3.13" long, this flexible antenna features a rigid reverse-polarity SMA plug connector for rigid upright installations on equipment. It is suitable as a replacement antenna for many access points and wireless equipment that feature reverse-polarity SMA connectors. The connector is crimped and soldered for excellent performance and low loss (Note this RF antenna is used as a "replacement" or "OEM" antenna rather than a "range extender" antenna). The antenna will achieve excellent range in most installations when the antenna is vertically positioned.
This is a bidirectional level shifter used to step down or up signals from 1.8V to 5V range.
Beacons are mounted on walls or ceilings to measure distance to other beacons and “hedgehog” using ultrasonic pulses. They communicate with router wirelessly in ISM band. Powered by LiPo battery or USB. Indoor Positioning System (IPS)