各式同軸電纜衰減量
衰減量標準直 dB/100M f=---MHz
| 品名 | 50(30) | 100(144) | 200 | 400(430) | 1000(1200)MHz |
| 3D2V | (8.0) | 22.5 | |||
| 5D2V | 4.6 | 12.5 | |||
| 8D2V | 3.0 | 8.5 | |||
| 10D2V | 2.6 | 6.5 | |||
| 5D-FB | 6.2 | 9.0 | 13 | 23.5 | |
| 8D-FB | 3 | (4.7) | 5.8 | (8.6) | (15.6) |
| 10D-FB | 2.4 | (3.8) | 4.8 | (7.2) | (13.5) |
| 12D-FB | 2.0 | (3.2) | 3.8 | (5.6) | (11.0) |
| 8D-SFA | 2.4 | (3.8) | 4.8 | (7.2) | (13.5) |
| 10D-SFA | 2.0 | (3.2) | 3.8 | (5.6) | (11.0) |
| 12D-SFA | 1.6 | (2.7) | 3.2 | (4.8) | (9.3) |
| RG142B | (6.5) | 12 | 25 | 40 | |
| RG178 | (28) | 45 | 90 | 150 | |
| RG188 | (24) | 37 | 64 | 100 | |
| RG213 | 6.2 | 26.3 | |||
| RG214/U | 7.6 | 29 | |||
| RG316 | (24) | 37 | 64 | 100 | |
| 9913 | 3 | 4.3 | 5.9 | 8.9 | 14.8 |
| 9914 | 3.6 | 5.2 | 7.9 | 11.5 | 19.7 |
當然或許有很多人會搞不清楚dB到底是多大,它的意義到底如何對於非專業人員實在很討厭,所以我們在此再列一張表標明衰減量﹑通過後功率比﹑以50瓦輸入後末端之功率(天線端)之關係,以便很簡單的就能瞭解。
| 衰減量dB | 通過後電功率比 | 輸入50瓦末端功率 |
| 0 | 100% | 50W |
| 0.1 | 97.7% | 48.85W |
| 0.2 | 95.5 | 47.75W |
| 0.3 | 93.3% | 46.65W |
| 0.4 | 91.2% | 45.6W |
| 0.5 | 89.1% | 44.55W |
| 0.6 | 87.1% | 43.55W |
| 0.8 | 83.2% | 41.6W |
| 1.0 | 79.4% | 39.7W |
| 1.5 | 70.8% | 35.4W |
| 2.0 | 63.1% | 31.55W |
| 2.5 | 56.2% | 28.1W |
| 3.0 | 50.1% | 25.05W |
| 3.5 | 44.7% | 22.35W |
| 4.0 | 39.8% | 19.9W |
| 4.5 | 35.5% | 17.75W |
| 5.0 | 31.6% | 15.8W |
| 6.0 | 25.1% | 12.55W |
| 7.0 | 20.0% | 10.0W |
| 8.0 | 15.8% | 7.9W |
| 9.0 | 12.6% | 6.3W |
| 10.0 | 10.0% | 5W |
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