Wireless Transmitting Devices

Microwaves:Microwaves are point to point towers or satalites call geocentric satelites, point to point means the towers or satelites must be in direct view of each other and for towers they must be less then 30 km apart for the signal to reach the other tower, but if a tower is transmitting to a satelite once the microwave goes through the atmosphere wich is only 16 km away the signal can travel for ever. microwaves can not travel through and objects including rain, this is the reason u often lose reception in storms. microwaves often are used for mobile phones but like other transmitting devices can be used for transmitting data.

Radio: Radio waves are generally used for mobile phones, wireless local are network (LAN), bluetooth and many more, radio waves are an alternative current (ac) wich is applied to the antena, when excited by this alternating current, the antena then radioates radio-radio waves in addition to there use in broadcasting, transmitters are a necessary component parts of many electronic devices, that communicate by radio.

Infrared: Infrared transmitting devices are things like, remotes for the tv, coredless modems, fire sensors, motion detectors, etc. you cannot see infraredwaves but u can feel it, when u put your hand nere a fire and feel the warmpth, that is a version of infrared transmittion, infrared cannot not get thought object for example if you put your hand infront of the remote it won't work, but it can reflect off of things such as mirrors and glass.