Unguided Transmission Media

Definition

• Unguided transmission media: Also known as wireless transmission media, it refers to the transmission of data through the air or free space without the use of physical cables or wires.

Types

• Radio Waves: Used for AM/FM radio, cell phones, and wireless networks.
• Microwaves: Used for satellite communications, wireless networks, and microwave ovens.
• Infrared: Used for short-range communication, such as TV remote controls and IrDA (Infrared Data Association) connections.

Characteristics

• Convenience: Unguided transmission media offer greater mobility and flexibility.
• Interference: Susceptible to interference from physical barriers, other devices, and environmental factors.
• Security: More vulnerable to eavesdropping and hacking.
• Range: Limited by the strength of the signal and the presence of obstacles.

Applications

• Wireless Networks: Wi-Fi, Bluetooth, and cellular networks.
• Satellite Communications: Used for global positioning, television broadcasting, and remote communication.
• Remote Controls: Used for TV remote controls, garage door openers, and other devices.