constraints on wiring: layer distribution Wiring restrictions: dispersion of layers The upper and lower neighboring levels of the RF wiring layer should be ground planes, and each layer of the RF PCB has a sizable area designated for auxiliary ground. There is also no power plane. Although the board is a hybrid of digital and analog, the digital portion can still have a power plane. However, the RF area must still adhere to the requirement of large-area auxiliary ground for each layer. Laminated RF single board construction
Wiring restrictions: The wiring must be as short as feasible, without closed loops or acute right angles, and must be the same width throughout. It must also not include any floating lines.