Microwave Bands

 Microwave bands are a range of frequencies in the microwave portion of the electromagnetic spectrum, typically between 1 GHz and 100 GHz. These frequencies are used for a variety of applications, including:

1. Wireless communication: Microwave bands are used for wireless communication technologies such as cellular networks, satellite communications, and wireless local area networks (WLANs).

2. Radar: Microwave bands are used for radar systems, which are used for a variety of applications including weather forecasting, air traffic control, and military surveillance.

3. Television and radio broadcasting: Some television and radio broadcasting are transmitted using microwave frequencies.

4. Remote sensing: Microwave bands are used for remote sensing applications such as imaging and measuring the earth's surface and atmosphere.

5. Industrial, scientific, and medical (ISM) applications: Some industrial, scientific, and medical equipment use microwave frequencies.

In the Amateur radio service, some microwave bands are allocated for use by Amateur radio operators, such as the 2.3GHz, 3.4GHz, 5.7GHz, 10GHz, and 24GHz bands. These bands are typically used for short-distance communications and experimentation with new technologies such as spread-spectrum communications and digital modulation schemes.

It's worth noting that, due to the high frequency of these bands, they require specialized equipment, a good understanding of RF engineering, and experience. Also, the power levels are usually limited, and the propagation can be affected by obstacles such as buildings and trees and atmospheric conditions.