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RG-393/U is a high-performance, low loss, high shielding effectiveness 50 ohm semi-rigid coaxial cable designed specifically for demanding microwave and RF applications, particularly in the military and aerospace fields. Its signature features are an outer diameter of approximately 4.83mm and a typical blue sheath. If you need this type of cable, be sure to confirm whether RG-393/U (or its finer sibling model RG-402/U) is suitable for your application based on specific frequency, power, bending requirements, and environmental conditions.
| Structure parameters | ||
| Item | Material | Diamenter (mm) |
| Inner Conductor | Silver plated copper wire | 7*0.792 |
| Dielectric | PTEF | 7.24 |
| Outer Conductor | Double layer silver plated copper wire weaving | 8.5 |
| Jacket | FEP | 9.91 |
| Performance parameters | ||
| Capacitor | 96.45pF/m | |
| Impedance | 50ohm | |
| Transmission rate | 70% | |
| Maximum operating voltage | 1.875KVrms | |
| Maximum operating frequency | 11000MHz | |
| Working temperature range | -55～+200℃ | |
| Bending radius | 51mm | |
| ROHS/CE/FCC | YES | |
| Frequency | 100MHz | 0.066dB/m |
| 400MHz | 0.141dB/m | |
| 1000MHz | 0.236dB/m | |
The electrical performance parameters of RG393 coaxial cable determine its applicable frequency range and transmission quality: characteristic impedance: standard value is 50 Ω or 75 Ω. 50 Ω impedance is suitable for RF and microwave communication (such as Wi Fi, radar), while 75 Ω impedance is mostly used for video signal transmission (such as cable TV). Attenuation constant: represents the signal loss per unit length of cable, measured in dB/m. At a frequency of 1GHz, the attenuation constant of RG393 is usually between 0.5dB/m and 1.0dB/m, depending on the cable length and material standing wave ratio (VSWR): reflecting the degree of matching between the cable and the load, the ideal value is 1:1. In practical applications, VSWR ≤ 1.5:1 can ensure efficient signal transmission and reduce reflection loss. Capacitance and inductance: The capacitance per unit length is about 100pF/m, and the inductance is about 0.2 μ H/m. These parameters affect the phase and amplitude characteristics of the signal and need to be optimized according to specific application scenarios.
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