Wireless Transmission Media

Wireless transmission media are type of media where data is transferred from one place to another without using any wire or cable. Some of the wireless transmission media are as follows:

• Radio Wave Transmission
• Bluetooth Wireless Technology
• Wi-Fi (Wireless Fidelity)
• Infrared Technology
• Microwave transmission

Radio Wave Transmission

Radio waves transmit music, conversations, pictures and data invisibly through the air, often over millions of miles. Radio waves travel in all directions from the source, so that the transmitter and the receiver do not have to be carefully aligned physically. These are easy to generate, can travel long distances and penetrate through buildings easily. The two technologies that use radio frequency waves to create a network are:

• Bluetooth Wireless Technology
• Wi-Fi (Wireless Fidelity)

Bluetooth Wireless Technology

Bluetooth is a wireless technology that lets you talk and share information like music, videos, etc. Bluetooth technology was invented in 1994 by engineers at Ericsson, a Swedish company. It is built into electronic gadgets.

                Mobile phone, FM radio and television, all use different kinds of radio waves to send information such as audio and videos without using wires. The biggest difference between Bluetooth technology and devices like FM radio and TV is ‘distance’. Radios and TVs are meant to broadcast information to many people over miles or kilometres. Bluetooth technology sends information within its personal space, which is called ‘PAN’. The maximum data transmission range of Bluetooth technology is 10 meters.

Wi-Fi

Wi-Fi stands for Wireless Fidelity. It is used in wireless network technology that uses radio waves to provide wireless high speed internet and network connections. Wi-Fi uses radio technology to provide secure, reliable and fast wireless connectivity.

Infrared Technology

Infrared technology is used to send documents from portable computers to printers, to connect home entertainment systems, and to exchange information between computers, cellular telephones and faxes. The communication range between the devices is very limited. These waves cannot penetrate walls, so there should be no physical barrier between the communicating devices.

Microwave Transmission

For long distance communication, microwave radio transmission is widely used as an alternative to coaxial cable. The main advantage of the microwave transmission is that building a cheaper than laying cable. 

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