A PCB high-frequency board refers to a specialized circuit board with electromagnetic frequencies higher than regular circuit boards. It is designed for applications in the high-frequency range (frequencies greater than 300 MHz or wavelengths less than 1 meter) and microwave domain (frequencies greater than 3 GHz or wavelengths less than 0.1 meters). PCB high-frequency boards are produced by utilizing certain processes of regular rigid circuit board manufacturing on microwave substrates with copper cladding, or by using special treatment methods. Generally, PCB high-frequency boards are defined as those designed for frequencies above 1 GHz.
are fabricated using advanced materials and techniques to ensure minimal signal losses and optimal performance at these frequencies.
With the rapid advancement of science and technology, an increasing number of device designs are operating in the microwave frequency range (greater than 1 GHz) and even in the millimeter-wave domain (30 GHz and above). This trend implies that frequencies are becoming higher, and consequently, the requirements for substrate materials in high-frequency circuit boards are becoming more stringent. For instance, substrate materials need to possess excellent electrical properties and chemical stability. As the frequency of the power signal increases, the demands for minimal losses on the substrate become more critical. This highlights the significance of high-frequency board materials.
