High-frequency PCB is specialized circuit board designed for high electromagnetic frequencies. Generally speaking, high frequency can be defined as frequencies above 1 GHz. They require extremely high physical properties, precision, and technical parameters. They are produced using microwave-based copper-clad laminates using some of the conventional rigid circuit board manufacturing processes or specialized processing methods. They are suitable for high-speed signal transmission and RF/microwave applications, such as 5G, automotive collision avoidance systems, communication base stations, radar, satellite equipment, and radio systems.