How to minimize the data transmission loop of a power DTU?

Minimizing DTU data transmission loops requires optimizing PCB layout and routing. Differential pair routing is used with a trace width of 0.2mm and a spacing of 0.3mm, maintaining impedance matching (100Ω). Loop area is reduced through tightly coupled routing, with differential pairs running in parallel and length matching error less than 5mm. Power decoupling capacitors are placed close to the IC power pins. A multilayer board is used, with the signal layer adjacent to the ground plane. Critical loops are partially covered with shielding. The loop inductance is calculated through simulation, with a target value less than 10nH. In actual testing, using a near-field probe to scan radiation, the optimized radiation intensity should be below 40dBμV/m in the 30MHz-200MHz range. Minimizing the loop can reduce radiated emissions by 20dB.