首页›计算器›传播延迟计算器🔌 科技与电子传播延迟计算器Enter a length and medium to compute propagation delay.Length (inches)MediumVacuum / air (Er=1)FR4 PCB (Er=4.4)Coax (Er=2.3)CalculateResetSharePrintResult will appear hereHow it works+公式delay = length ÷ (c ÷ √Er)