According to tests by Florida-based Satellite Users Interference Reduction Group (SUIRG), the radio frequencies WiMAX uses will interfere with satellite communications in some of the very locations where it could bring the most benefit.

The test results showe dthat WiMAX antennas can disrupt satellite reception up to 20 kilometres away from a base station. The test, conducted in  latte quarter of 2007, conclusively demonstrated that WiMAX communications pose a significant interference threat to satellite signals transmitted in the C-band frequency.

The field test was performed with support from several key industry organizations.