RJ45母座PCB线路的设计

之前没有做过网口类产品，以为简单直连就可以。
目前做验证发现，常规直连RJ45 f-f pin脚，这样做一个对接头，在实机测试的时候，产品能够正常通过网速测试，都可以达到1g的网速，但是测试fluke的时候，总是没有办法通过近端串扰和远端串扰。
在京东上购买了一个可以通过的产品，发现里面的线路走线比我想象的要复杂的多，所以想请教一下各位高频方面的工程师，帮忙解释一下这样走线的原因。
谢谢各位！

https://m.baidu.com/from=1020761t/bd_page_type=1/ssid=0/uid=0/pu=usm%403%2Csz%40320_1001%2Cta%40iphone_2_11.0_19_11.7/baiduid=F16DE8FE16DFAE2235E549EEC8D00337/w=0_10_/t=iphone/l=1/tc?ref=www_iphone&lid=12471363613716553666&order=3&gsflag=4&fm=alop&isAtom=1&waplogo=1&clk_info=%7B%22tplname%22%3A%22www_normal%22%2C%22srcid%22%3A%221525%22%2C%22jumpType%22%3A%22%22%7D&is_baidu=0&tj=www_normal_3_0_10_title&vit=osres&cltj=normal_title&asres=1&title=%E7%BD%91%E7%BB%9C%E6%8E%A5%E5%8F%A3(RJ45)%E5%B8%83%E7%BA%BF%E8%AE%BE%E8%AE%A1%E7%AE%80%E8%A6%81%E8%AF%B4%E6%98%8E_%E7%99%BE%E5%BA%A6%E6%96%87%E5%BA%93&wd=&eqid=ad132f216c4e9fc2100000056309acff&w_qd=IlPT2AEptyoA_yiHBpPsnOvZOl5UYc_EoU63rPaLdQFKJQBdAzse&bdver=2&tcplug=1&dict=-1&sec=23549&di=d9b8bbffb6b2d524&bdenc=1&tch=124.431.286.1941.3.901&nsrc=F5H4zVBoagm%2BOIygmTaLM%2FbLEI5sVRC%2F7qBc05CGv5NWFuovyySmtdG4XFUr04MAEK3U0CzCPz7%2FB%2B2OwEDdfCxa%2FCcA4%2B5Yc9OkNwivaQmK0gXvApXnw0ACZ2NVDpXl5Tjdgf6gNoUTkbYKIqPvSA%3D%3D

https://m.baidu.com/from=1020761t/bd_page_type=1/ssid=0/uid=0/pu=usm%403%2Csz%40320_1001%2Cta%40iphone_2_11.0_19_11.7/baiduid=F16DE8FE16DFAE2235E549EEC8D00337/w=0_10_/t=iphone/l=1/tc?ref=www_iphone&lid=12471363613716553666&order=4&gsflag=4&fm=alop&isAtom=1&waplogo=1&clk_info=%7B%22tplname%22%3A%22www_normal%22%2C%22srcid%22%3A1599%2C%22jumpType%22%3A%22%22%7D&is_baidu=0&tj=www_normal_4_0_10_title&vit=osres&m=8&cltj=normal_title&asres=1&title=rj45%E7%BD%91%E7%BB%9C%E6%8E%A5%E5%8F%A3pcb%E5%B8%83%E7%BA%BF-%E7%94%B5%E5%AD%90%E5%8F%91%E7%83%A7%E5%8F%8B%E7%BD%91&wd=&eqid=ad132f216c4e9fc2100000056309acff&w_qd=IlPT2AEptyoA_yiHBpPsnOvZOl5UYc_EoU63rPaLdQFKJQBdAzse&bdver=2&tcplug=1&dict=-1&sec=23549&di=20f9278bd9565aca&bdenc=1&tch=124.490.274.2227.1.320&nsrc=GIoREbr7yPAz54JPnhPBAOsxuaiMyPDxdl1rbMmL0tKzJvt%2BgkowybcGSPCVtaLqMKi2TIm49Tfk5TVr3D2m4ItuaW%2F3RuVNZUfMpGa%2BlF8%3D

https://m.baidu.com/from=1020761t/bd_page_type=1/ssid=0/uid=0/pu=usm%403%2Csz%40320_1001%2Cta%40iphone_2_11.0_19_11.7/baiduid=F16DE8FE16DFAE2235E549EEC8D00337/w=0_10_/t=iphone/l=1/tc?ref=www_iphone&lid=12471363613716553666&order=6&gsflag=4&fm=alop&isAtom=1&waplogo=1&clk_info=%7B%22tplname%22%3A%22www_normal%22%2C%22srcid%22%3A1599%2C%22jumpType%22%3A%22%22%7D&is_baidu=0&tj=www_normal_6_0_10_title&vit=osres&m=8&cltj=normal_title&asres=1&title=rj45pcb%E8%AE%BE%E8%AE%A1-%E7%94%B5%E5%AD%90%E5%8F%91%E7%83%A7%E5%8F%8B%E7%BD%91&wd=&eqid=ad132f216c4e9fc2100000056309acff&w_qd=IlPT2AEptyoA_yiHBpPsnOvZOl5UYc_EoU63rPaLdQFKJQBdAzse&bdver=2&tcplug=1&dict=-1&sec=23549&di=65dc41b6b3ad159c&bdenc=1&tch=124.526.183.2770.0.0&nsrc=GIoREbr7yPAz54JPnhPBAOsxuaiMyPDxdl1rbMmL0tJiE8%2B0Qp2qTDtP8ynIN8JiG49%2BGQc7LBQJJTxGlvbhj0A7YWbSZnScxp4wMdrQyVE%3D

https://m.baidu.com/from=1020761t/bd_page_type=1/ssid=0/uid=0/pu=usm%403%2Csz%40320_1001%2Cta%40iphone_2_11.0_19_11.7/baiduid=F16DE8FE16DFAE2235E549EEC8D00337/w=0_10_/t=iphone/l=1/tc?ref=www_iphone&lid=12471363613716553666&order=10&gsflag=4&fm=alop&isAtom=1&waplogo=1&clk_info=%7B%22tplname%22%3A%22www_normal%22%2C%22srcid%22%3A1599%2C%22jumpType%22%3A%22%22%7D&is_baidu=0&tj=www_normal_10_0_10_title&vit=osres&m=8&cltj=normal_title&asres=1&title=RJ45%E6%AF%8D%E5%BA%A7%E8%BF%9E%E6%8E%A5%E5%99%A8%E5%92%8C%E7%94%B5%E5%AD%90%E8%AE%BE%E5%A4%87%E7%9A%84%E5%88%B6%E4%BD%9C%E6%96%B9%E6%B3%95&wd=&eqid=ad132f216c4e9fc2100000056309acff&w_qd=IlPT2AEptyoA_yiHBpPsnOvZOl5UYc_EoU63rPaLdQFKJQBdAzse&bdver=2&tcplug=1&dict=-1&sec=23549&di=a821e83dcaa3bef8&bdenc=1&tch=124.635.277.3724.4.1201&nsrc=rnzfXg%2B2AkK%2Fn2zIRUuG%2Fs4WZLBVtcjKz70zXCfJqCQCERdyWpweE3laQTRSQ7Ba1ZkGnAfRPDNT0gLciFbRrZV8fsTtGaj3hIHbAstmkOGYujKj9nDok%2FriKn7HVD0q

个人认为还是通过这个方式达到电容滤波的作用
本质上RJ45的高频通讯，也属于信号
信号抗干扰从线路上设计电容滤波可以达到吸收杂乱信号的的目的
在线路的终点设计对应容抗的电容电路应该也可以达到这个效果