Coax Loss Calculator馈线损耗计算器
How much of your power actually reaches the antenna? Pick a cable, enter your run length and frequency.你的功率到底有多少送到了天线？选馈线型号，输入长度和频率。
Try试试:
Result计算结果
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dB / 100 ft每 100 英尺损耗
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Total loss (dB)总损耗
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Power at antenna到达天线功率
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S-units lost损失的 S 值
Compare all cables五种馈线对比
Same length and frequency, sorted by total loss. Your selected cable is highlighted.相同长度和频率下五种馈线的损耗对比，按总损耗排序，你选的型号会高亮。
| Cable型号 | dB / 100 ft每百英尺 | Total dB总损耗 | Power %剩余功率 |
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Typical manufacturer values (Times Microwave, Belden class) — measure your own run for exact numbers. 1 S-unit ≈ 6 dB.典型厂家标称值（Times Microwave、Belden 同级）——精确数值请实测自己的馈线。1 个 S 单位 ≈ 6 dB。