Testing Altai Antennas
As part of ongoing quality control checks I recently conducted testing of two new Altai Wi-Fi antennas and compared them with two of our current offerings in the 2.4GHz WiFi spectrum.
New antennas tested were:
- 2.4GHz 12 dBi MIMO Omnidirectional V + H Polarisation
- 2.4GHz 18 dBi MIMO 65° Sector +-45° Polarisation
Tests were carried out at my favourite location on the Gold Coast, Queensland. It offers an elevated 10 metre platform with clear line of site for 650 metres. Readings were taken at 100, 200, 300, 400, 500 and 650 metres consecutively using a smartphone app, laptop app, and accessing the Access Point association lists in order to gain a broad range of results.
In the interest of maintaining high quality user experiences, a target Receive Signal Strength Indication (RSSI) of better than -65 dB is always recommended. Using maximum EIRP of 36.00 dB, average RSSI’s and SNR’s (Signal to Noise Ratio) were calculated for each antenna.
The results were hardly surprising, higher gain antenna = better coverage, longer distances. I was very pleased with the overall quality and reach and happy to recommend options for your own outdoor wifi project.
Keeping in mind the Access Points while operating in the 2.4GHz IMS unlicensed spectrum they are subject to conditions of the ACMA Low Interference Potential Devices (LIPD) Class license which stipulates a maximum EIRP (Equivalent Isotropic Radiated Power) of 4 watts or 36dB.
The EIRP calculation is as follows