Infrared
Characteristics:
- medium speed infrared: 1.150 Mbps
- fast-speed infrared: 4.00 Mbps
Advantages and disadvantages
- Infrared communications utilise transmitters and receivers that sending signals through infrared light
- Infrared operates by sending a signal in a straight line from the source to the destination where frequencies just above microwaves are used
- If this “direct line of sight” signal is obstructed by an object, then the signal will not transmit as the signal cannot penetrate through the surface of the object, however it can reflect from surfaces such as the ceiling of a room
- It is generally used for short distance transmission such as a TV remote
- It does not require an antenna to operate
- Speed: The speed varies:
- medium speed infrared: 1.150 Mbps
- fast-speed infrared: 4.00 Mbps
- Capacity: 300GHz - 400THz
- Cost: low
- Security: medium
Advantages and disadvantages