Unguided media, also known as wireless media, refers to the transmission medium that transports data without the use of physical medium.
Thank you for reading this post, don't forget to subscribe!• It utilizes electromagnetic waves to transmit data over the air. This type of communication is essential for mobile, satellite, and other wireless communications.
• Unlike guided media, unguided media does not rely on a physical path for signal transmission.
1.) Radiowaves
Radiowaves are a type of electromagnetic wave with wavelengths longer than infrared light. They are used for transmitting data wirelessly over long and short distances.
Characteristics:
- Frequency Range: Typically ranges from 3 kHz to 300 GHz.
- Propagation: Can travel long distances and penetrate through buildings and other obstacles.
- Uses: Broadly used in broadcasting (radio, TV), communication systems (Wi-Fi, mobile networks), and other wireless applications.
2.) Microwaves
Microwaves are a type of electromagnetic wave with wavelengths ranging from one meter to one millimeter, or equivalently, frequencies between 300 MHz (0.3 GHz) and 300 GHz.
Characteristics:
- Frequency Range: 1 GHz to 300 GHz.
- Propagation: Line-of-sight communication; typically requires direct paths without obstructions.
- Uses: Widely used in satellite communication, radar systems, and point-to-point communication links.
Types of Microwaves:
1.) Terrestrial Microwave:
- Used for point-to-point communication on the Earth’s surface.
- Applications: Long-distance telephone transmission, TV signals, and data communication.
- Equipment: Requires microwave antennas (dishes) positioned for line-of-sight transmission.
2.) Satellite Microwave:
- Uses satellites to relay signals from one point on Earth to another.
- Applications: International telecommunication, TV broadcasting, internet services.
- Equipment: Ground stations with satellite dishes to send and receive signals to and from satellites in orbit.