说明：  搞了个小工具，方便大家计算！不用动笔了！欢迎使用，有bug请斧正，谢谢！ Rf Calc 包含功能： ① mW换算为dBm； ② dBm换算为mW； ③ 空间损耗计算； ④ 链路裕量； ⑤ 传输距离计算。
(Carried out a small tool to facilitate the calculation! Do not have to write a! Welcome, there are bug please斧正, thank you! Rf Calc includes functions: ① mW converted to dBm ② dBm converted to mW ③ space loss calculation ④ link margin ⑤ Calculation of transmission distance.)