https://blog.wongcw.com/2020/09/02/%e6%94%af%e6%8c%816ghz-%e8%8f%af%e7%a2%a9rog%e7%99%bc%e5%b8%83%e5%85%a8%e7%90%83%e9%a6%96%e6%ac%bewi-fi-6e%e8%b7%af%e7%94%b1%ef%bc%9a%e5%9d%90%e4%ba%ab%e8%90%ac%e5%85%86/