This article is from old friend Steve KennedyThe Article is from the great technology news service

WiMAX is another specification that has come out of the Institute of Electrical and Electronic Engineers (IEEE) in the US, like Wi-Fi which comes under the 802.11 group. There are two variants of WiMAX, 802.16d which covers fixed installations and 802.16e covering mobile use.

Fixed means point-to-point or point-to-multipoint links, for example, connections to buildings that don't move, while mobile is for laptops and covers users moving between base stations - rather like a cellular network.

The technology behind WiMAX actually works, the specification has taken a while to get to fruition but that's helped it in terms of making sure the bugs are out and it can be used in real life.

Many of the issues that plague Wi-Fi networks just can't happen in WiMAX. Networks can grow, users still maintain usable bandwidth, and interference just doesn't occur. WiMAX can easily achieve a usable 75Mb/s across a wireless link.

The original WiMAX specification allowed frequencies in the range of 2GHz to 60GHz, but it's almost impossible to produce radio equipment using commercial processes on silicon that work at the higher end. A modified specification was then introduced, known as 802.16d-2004, which reduced the frequency range to between 2GHz and 11GHz, which is much easier to support on silicon. This is what's known as WiMAX today. More on link