EMI传导高频余量不足的解决方案???

滤波器原理图及传导波形如图所示,滤波器后极为PFC,从传导波形图可以看到在0.15M及30MHz处余量均不大,0.15M处通过增加差模电感比较好解决,但是在30M处比较困难,各位出出主意,在30M处如何增大余量?谢了!!!500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/68/734991218088575.gif');}" onmousewheel="return imgzoom(this);">500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/68/734991218088614.gif');}" onmousewheel="return imgzoom(this);">