What are the PCB wiring constraints?

What are the PCB wiring constraints? (1) The top layer of the PCB takes the RF signal. The plane layer under the RF signal must be a complete ground plane to form a microstrip line structure. As shown in Figure 13. To ensure the structure integrity of the microstrip line, it must be done: in the same layer, the micropipe line should be treated, it is recommended to have a width of 3 hours from the edge of the microstrip line. H represents the thickness of the dielectric layer. Other signal via holes must not have other signals within 3m. The RF signal trace is prohibited across the horizontal gap of the second layer. The non-coupling microstrip line should be added to the copper, and the via holes are added on the ground copper. The microstrip line to the shield wall should be maintained for more than 3 hours. The microstrip line shall not spridge the plane of the second floor. Be (2) Requires the copper skin to the signal trace to ≥ 3h. (3) The edge of the ground copper edge is added, and the hole pitch is about 100mils, uniformly and neatly arranged; (4) The edge of the ground wire is smooth, flat, prohibited from sharp burrs; Be (5) Except for special purposes, the RF signal is prohibited from reaching out of excess lines. (6) If other RF signals around the RF signal wiring, the copper skin is to be supplemented between the two, and a ground vias are added to the ground, and the isolation is added to the left and right of the ground. (7) If there is any other disconnected non-RF signal (such as a circuit power cord) around the RF signal, a ground via is added to the two in the two. (8) The RF signal via and other wirings of the inner layer are close, such as the crossover power line shown in the left, close to the RF signal via, the EMI interference on the power line will enter the RF wiring, so the right picture of Fig. 14 is used. The correct wiring method is adjusted to the power line and the RF signal via hole, and the isolation effect is separated. Sometimes the innermost RF signal line is close to other signals (such as the row power line), and also use the same method to assist and add aperture. Be (9) When the device mounting hole is a non-metallized hole, the RF signal wiring should be remote from the device mounting hole. It is necessary to assist in the RF signal wiring and the mounting hole, and the forales are joined. Read more

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