Knowledge of High Frequency PCB

What is High Frequency PCB? What about the application of high frequency PCB?Let’s discuss about this together.
High Frequency PCB is a special circuit board with high electromagnetic frequency. The frequency of high frequency is above 1GHz. High Frequency PCB has very high requirements for physical properties, accuracy and technical parameters. It is commonly used in Radar, Military Equipment, Aerospace and other fields.

First, High-Frequency PCB materials? The performance of High-Frequency PCB in wireless or other high-frequency occasions depends on building materials. For many applications, the use of FR4 material can improve the dielectric properties. When manufacturing high-frequency PCB, the commonly used raw materials include Rogers, Isola, Taconic, Panasonic, Taiyao and other boards.

The DK of High-Frequency PCB should be small and stable. Generally, the smaller the better. High-Frequency PCB will cause signal transmission delay. DF should be very small, which mainly affects the signal transmission quality. Smaller DF can correspondingly reduce signal loss. In humid environment, it has low water absorption and strong water absorption capacity, which has an impact on DK and DF.

The thermal expansion coefficient of the High-Frequency PCB needs to be the same as that of the copper foil as much as possible, because the High-Frequency PCB may cause the separation of the copper foil in the case of alternating cold and heat, and be the same as that of the copper foil as much as possible, so as to ensure the perfect performance of the High-Frequency PCB. High Frequency PCB has the characteristics of heat resistance, chemical corrosion resistance, impact resistance and good peeling resistance.
High Frequency PCB is generally used in radar system, satellite, antenna, cellular telecommunication system – power amplifier and antenna, live broadcast satellite, E-band point-to-point microwave link, radio frequency identification (RFID) tag, airborne and ground radar system, millimeter wave application, missile guidance system, space satellite transceiver and other fields.

With the rapid development of science and technology, the functions of equipment are becoming more and more complex. Many equipment are designed in the microwave frequency band or even more than millimeter wave. This also means that the frequency is increasing, and the requirements for circuit board substrate are becoming higher and higher. With the increase of power signal frequency, the loss of matrix material is very small, so the importance of high-frequency board is highlighted