Structure and Usage
It is suitable to be used as the transmission line of internal and external video signal as well as the transmission line of high frequency or UHF which is laid permanently or flexibly in the field of communication, navigation, electronic countermeasures, radio equipment, broadcasting and other similar electronic devices.
As to the outstanding characteristics, its high frequency of use, small index of standing wave and attenuation pieces, excellent performance in shielding, high reliability, light weight, strong resistance to high temperature, moisture, corrosion, and fire are all to be cited. Furthermore, its ideal range of working temperature is from -70℃ to 200℃.
The Size and Main Performance Parameters of SFT Miniature Coaxial-cable
| ID | Model | Internal Conductor | Insulation | External Conductor | Characteristic Impedance | Main Performance Parameters | |
| decay constant Max (10GHz) dB /m | withstand voltage rms (50Hz) kV | ||||||
| 1 | SFT-50-0.6 | 0.18 | 0.60 | 0.86 | 50 | 6.23 | 2.0 |
| 2 | SFT-50-1 | 0.23 | 0.90 | 1.20 | 4.27 | 2.0 | |
| 3 | SFT-50-2 | 0.45 | 1.60 | 2.00 | 2.63 | 5.0 | |
| 4 | SFT-50-3 | 0.84 | 2.80 | 3.50 | 1.50 | 5.0 | |
| 5 | SFT-50-5 | 1.63 | 5.00 | 6.30 | 1.08 | 7.5 | |
| 6 | SFT-75-1 | 0.15 | 1.00 | 1.20 | (18GHz) 5.80 | 2.0 | |
The Structure and Size of SFF Miniature Coaxial-cable
| ID | Model | Outer Diameter of the Internal Conductor | Outer Diameter of insulation | Outer Conductor | Outer diameter of the External Conductor | Outer Diameter of Sheath |
| 1 | SFF-50-1-1 | 0.30 | 0.87 ± 0.07 | 0.09-0.15 | 1.45 | 1.8 ± 0.15 |
| 2 | SFF-50-1.5-1 | 0.54 | 1.5 ± 0.08 | 0.09-0.15 | 2.10 | 2.55 ± 0.15 |
| 3 | SFF-50-1.5-2 | 0.54 | 1.5 ± 0.08 | 0.09-0.15 | 2.70 | 3.2 ± 0.15 |
| 4 | SFF-50-2-1 | 0.73 | 2.2 ± 0.10 | 0.09-0.15 | 2.80 | 3.3 ± 0.15 |
| 5 | SFF-50-2-2 | 0.73 | 2.2 ± 0.10 | 0.09-0.15 | 3.45 | 4.0 ± 0.20 |
| 6 | SFF-50-3-1 | 0.93 | 3.0 ± 0.12 | 0.09-0.15 | 3.90 | 4.5 ± 0.25 |
| 7 | SFF-50-3-2 | 0.93 | 3.0 ± 0.12 | 0.09-0.15 | 4.75 | 5.5 ± 0.25 |
| 8 | SFF-50-5-1 | 1.48 | 4.6 ± 0.13 | 0.09-0.15 | 5.60 | 6.4 ± 0.30 |
| 9 | SFF-5-7-1 | 2.46 | 7.3 ± 0.20 | 0.09-0.15 | 8.50 | 9.2 ± 0.30 |
| 10 | SFF-75-1-1 | 0.17 | 0.87 ± 0.07 | 0.09-0.15 | 1.45 | 1.8 ± 0.15 |
| 11 | SFF-75-1.5-1 | 0.30 | 1.5 ± 0.10 | 0.09-0.15 | 2.10 | 2.55 ± 0.15 |
| 12 | SFF-72-1.5-2 | 0.30 | 1.5 ± 0.10 | 0.09-0.15 | 2.75 | 3.2 ± 0.15 |
| 13 | SFF-75-31-1 | 0.55 | 3.0 ± 0.12 | 0.09-0.15 | 3.90 | 4.5 ± 0.25 |
| 14 | SFF-75-3-2 | 0.55 | 3.0 ± 0.13 | 0.09-0.15 | 4.75 | 5.5 ± 0.25 |
| 15 | SFF-75-5-1 | 0.82 | 4.6 ± 0.13 | 0.09-0.15 | 5.60 | 6.4 ± 0.30 |
| 16 | SFF-75-100-1 | 0.70 | 7.3 ± 0.20 | 0.09-0.15 | 8.50 | 9.2 ± 0.30 |
Electrical Properties and Mechanical Properties
| ID | Electrical Properties and Mechanical Properties | Model | Standard Value | Model | Standard Value |
| 1 | Insulation Resistance at 20 ℃ MΩ.km | RG-178 /U | > 500 | RG-179 /U | > 500 |
| 2 | Working Temperature℃ | -70-200 | -70-200 | ||
| 3 | Operating Voltage V | 750 | 900 | ||
| 4 | Capacitance pF /M | 95.8 ± 5.0 | 64.4 ± 5.0 | ||
| 5 | Speed Ratio % | 69.5 ± 3.0 | 69.5 ± 3.0 | ||
| 6 | Characteristic Impedance Ω | 50 ± 3.0 | 75 ± 3.0 | ||
| 7 | Decay Constant 20 ℃ 200 (MHz) -dB/100FT700 (MHz) (+ /-10%) 1000 (MHz) | 19.0 | 12.5 | ||
| 37.0 | 19.7 | ||||
| 46.0 | 24.0 | ||||
| 8 | Insulation resistance at 20 ℃ MΩ.km | RG-316 /U | > 500 | RG-316/DT | > 500 |
| 9 | Working Temperature ℃ | -70-200 | -70-200 | ||
| 10 | Operating Voltage V | 900 | 900 | ||
| 11 | Capacitance pF /M | 95.8 | 95.8 | ||
| 12 | Speed ratio % | 69.5 ± 3.0 | 69.5 ± 3.0 | ||
| 13 |
Characteristic Impedance Ω |
50 ± 3.0 | 50 ± 3.0 | ||
| 14 | Decay Constant 20 ℃ 200 (MHz) -dB/100FT700 (MHz) (+ /-10%) 1000 (MHz) | 12.0 | 12.0 | ||
| 23.7 | 23.7 | ||||
| 29.0 | 29.0 |
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