For general frequency, use FR-4 sheet, but high-frequency materials should be used in the frequency ratio of 1-5G, such as semi-ceramic materials. ROGERS 4350, 4003, 5880, etc. are commonly used ... If the frequency is higher than 5G, it is best to use PTFE material, which is polytetrafluoroethylene. This material has good high-frequency performance, but there are limitations in the processing arts, such as the surface technology that cannot be hot air leveled. The following is about ISOLA FR408 High Frequency PCB related, I hope to help you better understand ISOLA FR408 High Frequency PCB.
The frequency of vehicle millimeter wave radar is mainly divided into 24GHz frequency band and 77GHz frequency band, of which 77GHz frequency band represents the future trend. The reliability of 77G radar board is very important. It is related to the safety of car driving. Among them, the reliability of electroplating is the most important factor affecting its reliability. The following is about Car Collision Avoidance Radar PCB related, I hope to help you better understand Car Collision Avoidance Radar PCB.
The aperture ratio of PCB is also called the ratio of thickness to diameter, which refers to the thickness of the board / aperture. If the aperture ratio exceeds the standard, the factory will not be able to process it. The limit of the aperture ratio cannot be generalized. For example, via holes, laser blind holes, buried holes, solder mask plug holes, resin plug holes, etc. are different. The aperture ratio of the via hole is 12: 1, which is a good value. The industry limit is currently 30: 1. The following is about 8MM Thick PCB related, I hope to help you better understand 8MM Thick PCB.
It is generally believed that if the frequency of a digital logic circuit reaches or exceeds 45MHZ ~ 50MHZ, and the circuit operating above this frequency has already occupied a certain portion of the entire electronic system (say 1/3), it is called a high-speed circuit. The following is about R5775G High-speed PCB related, I hope to help you better understand R5775G High-speed PCB.
The delay per unit inch on the PCB is 0.167ns. However, if there are more vias, more device pins, and more constraints set on the network cable, the delay will increase. Generally, the signal rise time of high-speed logic devices is about 0.2ns. If there are GaAs chips on the board, the maximum wiring length is 7.62mm. The following is about RO3003 PCB related, I hope to help you better understand RO3003 PCB.
Signal transmission occurs at the moment when the signal state changes, such as rise or fall time. The signal passes a fixed time from the driving end to the receiving end. If the transmission time is less than 1/2 of the rise or fall time, the reflected signal from the receiving end will reach the driving end before the signal changes state. Conversely, the reflected signal will reach the drive end after the signal changes state. If the reflected signal is strong, the superimposed waveform may change the logic state. The following is about 12 Layer Taconic High Frequency Board related, I hope to help you better understand 12-Layer Taconic High Frequency PCB.
