I am not reaching theoretical wireless throughput

Issue: The device overview shows that my devices are not connecting at full speeds. 802.11n throughput depends heavily on 40MHz channel width and additional antennas.

  • iPad 1 : 802.11n certified but 1 Antenna, 20MHz only : max. theoretical throughput: 65Mbit/s
  • 1 Antenna, 40MHz : 150Mbit
  • Netgear WNDA3200 USB Stick: 802.11n , 2 Antenna, 40MHz : max. theoretical throughput: 300Mbit/s
  • 3 Antenna , 20MHz: 195Mbit
  • 3 Antenna , 40MHz: 450Mbit

The iPad 1 is in compliance with 802.11n but delivers only slightly better performance than previous 802.11g.

Root cause: 40MHz in 2.4GHz bands is often deactivated because of interference with other channels. There are only 3 20MHz channels without overlapping available in the 2.4.GHz band.

Solution: For a complete table see IEEE_802.11n-2009

This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.More information about cookies
  • Last modified: 2019/09/11 15:36
  • by tmomas