Download Wireless Sensing Technology

7. IO ACCESSORIES
7.1 ANTENNA
One of the more important accessories of a wireless network is the antenna.
Antennas are designed to increase the effective power of the transmitter by focusing the
radiated energy in the desired direction. Using the correct antenna and ensuring correct
polarisation not only focuses power into the desired area but it also reduces the amount of
power broadcast into areas where it is not needed.
Most antennas broadcast in a horizontal pattern, so vertical separation is more meaningful
than horizontal separation. If you need to install two antennas next to each other ensure to
separate the antennas with like polarisation and a minimum distance of two wavelengths:
About 25 cm separation for 2.4GHz or 70 cm separation for 900MHz
Below is a short list of a number of antennas that can be used in a ZigSense network
Small and flexible antenna
A24-HG2402-RD-RSF: 2dBi ‘rubber duck’ OMNI antenna
A24-HG2403-RD-RSF: 3dBi ‘rubber duck’ OMNI antenna
A24-HG2405-RD-RSP: 5dBi ‘rubber duck’ OMNI antenna
Mid size base station OMNI antenna
A24-HGV-2404: 4dBi fibreglass OMNI antenna
A24-HGV-2406: 6dBi fibreglass OMNI antenna
A24-HGV-2408: 8dBi fibreglass OMNI antenna
Directional High Gain antennas
A24-HG2409Y: 9dBi Radome enclosed directional antenna
A24-HG2405P-135: 5dBi Wi-Fi patch directional antenna
7.2 Battery
Every ZigSense node has an internal battery inserted by the system integrator or installer.
The battery is used to operate the node when external power is not available. The batteries
use Lithium technology
Battery specifications
ZigSense
Model
ZS24-REU-001
ZS24-RRU-001
ZS24-CGU-001
Battery
Model
1 x AA
1 x AA
2 x AA
Battery
Technology
Lithium
Lithium
Lithium rechargeable
ZigSense User Manual Rev.C
- 21 -
Battery
Voltage
3.6
3.6
7.2
Battery
Current
2.4 A/h
2.4 A/h
2.4 A/h