Wireless Media
Radio
- Wireless transmission of electrical waves over air
- Each device has a radio transceiver with a specific frequency
- Low power transmitters (few miles range)
- Often attached to portables (Laptops, PDAs, cell phones)
- Includes
- AM and FM radios, Cellular phones
- Wireless LANs (IEEE 802.11) and Bluetooth
- Microwaves and Satellites
Infrared
- “invisible” light waves (frequency is below red light)
- Requires line of sight; generally subject to interference from heavy rain, smog, and fog
- Used in remote control units (e.g., TV)