ELECTROMAGNETIC WAVES---BROADBAND; Wi-Fi; WIRELES; WiMax; WLAN.

All wireless and mobile networks create Electromagnetic Energy and Fields ( EME )

Based on speed and distance, wireless access technologies are commonly divided, into distance that the signals may carry.

5 to 15 to 50 Meters Wi-Fi Range.
80 Meter UWB Ultra-wideband.
25 to 30 to 60 Miles WiMAX Worldwide Interoperability for Microwave Access

Wi-Fi products are used to build WLANs, while WiMAX products are used to build WMANs.

Examples of wireless equipment in use today include:
GPS; Satellite :Cordless mouse: Cellular phones and pages; Wireless LANs ; GPRS ; GSM; IR wireless: PCS;

Benefits of WiMax over Wi-Fi they are two different technologies .

Wi-Fi is a cheap solution aimed to cover short distances and clients offering speeds of up to 200 Mbps; while WiMax is the next-generation of wireless technologies that's very expensive and aims to cover long distances without necessarily having a line of sight.

Wi-Fi products are used to build WLANs, while WiMAX products are used to build WMANs

WLAN ( LAN) devices linked together by wireless within a relatively small space like a single office building or home. WLAN ( LAN) mobile user can connect to a local area network, notebook computers and laptops

WMANs providing a wireless alternative to wireline Internet access technologies like DSL, cable, or fiber. connect subscriber stations (customer premise equipment) to base stations (carrier network infrastructure),