The Electronic PCB Card Relayout can help engineer to regenerate the gerber file and layout scheme from exisiting printed circuit board, during this process, the ground wire in the PCB board layout design of the Radio frequency circuit should be as follows:
(1) First, the circuitry pattern is divided into blocks. The RF circuit can basically be divided into high frequency amplification, mixing, demodulation, local oscillator and other parts. When reverse RF circuit PCB layout, it provides a common potential reference point for each circuit module That is, each module circuit has its own ground wire, so that the signal can be transmitted between different circuit modules: then summarized in the place where the RF circuit PCB is connected to the ground wire, that is, summarized in the total ground wire, because there is only one reference point, so There is no common impedance coupling, so there is no mutual interference problem;
(2) The digital area and the analog area should be isolated by the ground wire as much as possible, and the digital ground and the analog ground should be separated, and finally connected to the power ground;
(3) The ground wire in each part of the circuit should also pay attention to the single-point grounding principle, minimize the signal loop area, and connect to the ground wire of the corresponding filter circuit in close proximity;
(4) It is best to isolate each module circuit with a ground wire if space permits, to prevent signal coupling effects between each other.
