Millimeter-wave refers to electromagnetic waves with wavelengths ranging from 1 millimeter to 10 millimeters, corresponding to frequencies between 30 GHz and 300 GHz. This part of the spectrum is situated between microwave and infrared radiation. Millimeter-waves are used in various applications, including telecommunications, radar systems, and medical imaging. One of the key advantages of millimeter-wave technology is its ability to carry large amounts of data over short distances, making it ideal for high-speed wireless communication, such as 5G networks. Additionally, millimeter-waves can penetrate through rain and fog, which enhances their effectiveness in certain weather conditions.