When calculating the length of a feed line in antenna engineering, it is often necessary to know the propagation speed of radio waves in the feed line. The speed of radio waves in coaxial cables within commonly used amateur frequency bands is approximately 0.65 times the speed of light in a vacuum.
天线工程中计算馈线长度时经常需要知道电波在馈线中的传播速度。常用业余频段的电波在同轴电缆中的传播速度大约是真空波速的0.65倍。
| 正面 | LK0974 天线工程中计算馈线长度时经常需要知道电波在馈线中的传播速度。常用业余频段的电波在同轴电缆中的传播速度大约是： |
|---|---|
| 背面 | 真空波速的0.65倍 |
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