Do you know what high-frequency PCB is ? What applications are high-frequency PCB used for? Today, the editor of United Multilayer will show you what high-frequency PCB is and in what fields it is used.

High-frequency PCB is a special circuit board with a higher electromagnetic frequency, which is above 1GHz. The physical properties, precision and technical parameters of high-frequency PCB are very high, and it is often used in radar, military equipment, aerospace and other fields.

First, let’s take a look at the materials used to make high-frequency PCBs . The performance of high-frequency boards in wireless or other high-frequency applications depends on the building materials. For many applications, the use of laminated FR4 materials can improve dielectric properties. When manufacturing high-frequency PCBs, commonly used boards include Rogers, ISOLA, Taconic, Panasonic, Taiyao, etc.

The DK of high-frequency PCB should be small and stable, usually the smaller the better. High-frequency PCB will cause signal transmission delay. DF should be very small, which mainly affects the quality of signal transmission. Smaller DF can reduce signal loss accordingly. In a humid environment, the water absorption rate is low and the water absorption capacity is strong, which has an impact on DK and DF.

The thermal expansion coefficient of the high-frequency circuit board needs to be as close as possible to that of the copper foil, because the high-frequency circuit board may cause the copper foil to separate when it is hot and cold. Only by making it as close as possible to the copper foil can the performance of the high-frequency circuit board be perfectly exerted. High-frequency PCB has the characteristics of heat resistance, chemical corrosion resistance, impact resistance, and good peeling resistance.

High frequency PCBs are generally used in radar systems, satellites, antennas, cellular telecommunication systems – power amplifiers and antennas, direct broadcast satellites, E-band point-to-point microwave links, radio frequency identification (RFID) tags, airborne and ground radar systems, millimeter wave applications, missile guidance systems, space satellite transceivers, and more.

With the rapid development of science and technology, the functions of equipment are becoming more and more complex, and many devices are designed in the microwave frequency band or even beyond the millimeter wave. This also means that the frequency is constantly increasing, and the requirements for the circuit board substrate are getting higher and higher. As the frequency of the power signal increases, the loss requirement for the substrate material is very small, so the importance of high-frequency boards is highlighted.

KKPCB provides global customers with one-stop services from PCB layout, prototype PCB proofing, PCB manufacturing, PCBA processing (including SMT and DIP), PCBA testing, PCBA product assembly and outbound packaging. You could provide a Gerber file or BOM list to us, we will offer the finished PCB products or PCB assembly which are satisfied with you.