利用磁环抑制共模辐射的效果比较 简介: 老大proposed to add two ferrite rings (TDK HF70SH40X2X12) in series on the adaptor PCB to suppress the CM noise on tracks between the control pod and the adaptor PCB. The results are compared against without these ferrites. It is shown that 5~8dB improvement can be achieved by adding these suppressors. Tests are done at 3m distance with the vertical antenna 1m above the ground. 实物照片
测试结果和原理图请见附件: |