High frequency PCB boards are special circuit boards with higher electromagnetic frequencies. Generally speaking, high-frequency can be defined as frequencies above 1GHz. Its various physical properties, accuracy, and technical parameters require very high requirements, and are often used in automotive anti-collision systems, satellite systems, radio systems and other fields.
With the rapid development of science and technology, more and more equipment designs are applied in the microwave frequency band (>1GHZ) and even in the millimeter wave field (30GHZ), which also means that the frequency is getting higher and higher, and the requirements for the circuit board are getting higher and higher. For example, the substrate material needs to have excellent electrical properties, good chemical stability, and the loss on the substrate with the increase of the power signal frequency is very small, so the importance of the high-frequency PCB board is highlighted.