High-frequency PCB refers to a special circuit board designed to operate at high electromagnetic frequencies. It is utilized for high-frequency (frequencies greater than 300MHz or wavelengths less than 1 meter) and microwave applications (frequencies greater than 3GHz or wavelengths less than 0.1 meter). High-frequency PCBs are manufactured using parts of the processes used for ordinary rigid circuit boards or through special processing methods. Typically, a high-frequency board is defined as a circuit board with a frequency above 1GHz.

As science and technology continue to advance, more equipment designs are being utilized in the microwave frequency band (>1GHz) and even in the millimeter wave field (30GHz). This trend indicates an increase in frequency, resulting in higher material requirements for circuit boards. For example, the substrate material must possess excellent electrical properties and chemical stability, with minimal signal loss at higher frequencies. As a result, the significance of high-frequency boards is becoming increasingly prominent.

2.1 Mobile communication products, intelligent lighting systems

2.2 Power amplifiers, low-noise amplifiers, etc.

2.3 Passive components such as power splitters, couplers, duplexers, filters, etc.

2.4 High-frequency electronic equipment is a growing trend in fields like automobile collision prevention systems, satellite systems, and radio systems.