Description
RG-142 is a specialized, high-reliability coaxial cable designed for demanding RF applications. It is most notable for its exceptional thermal stability, utilizing a PTFE (Teflon) dielectric and a high-temperature FEP (Fluorinated Ethylene Propylene) jacket. This allows the cable to operate in extreme environments ranging from -55°C to +200°C without compromising electrical performance.
The cable features a solid silver-plated copper-clad steel (SPCCS) center conductor, which provides superior conductivity at microwave frequencies and high tensile strength. To ensure maximum signal integrity, it employs a double-braided silver-plated copper shield. This dual-layer shielding offers superior RF isolation and significantly lower attenuation than standard single-shielded cables. It is a preferred choice for GPS, medical equipment, and internal system links where interference must be eliminated. It is typically terminated with SMA, N-Type, or TNC connectors.
Key Technical Advantages
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Extreme Temperature Resistance: The PTFE and FEP construction allows for reliable operation in high-heat industrial or aerospace environments where standard PVC cables would melt.
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Superior Double Shielding: Two layers of silver-plated copper braid provide excellent shielding effectiveness (>60 dB), ensuring minimal signal leakage and high immunity to EMI.
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High-Frequency Precision: Optimized for performance into the microwave spectrum (up to 8GHz and higher), providing a flat response and low VSWR.
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Silver-Plated Components: Both the conductor and shields are silver-plated to maximize conductivity via the “skin effect” and provide excellent corrosion resistance.
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Chemical and Fluid Resistance: The FEP jacket is inert to most chemicals, oils, and solvents, making it ideal for medical, laboratory, and aircraft applications.
Key Features
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Cable Type: RG-142B/U Coaxial.
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Impedance: 50 Ohm.
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Center Conductor: Solid Silver-Plated Copper-Clad Steel (SPCCS).
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Shielding: Double Silver-Plated Copper Braid (95% coverage per layer).
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Dielectric: PTFE (Teflon).
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Common Applications: Avionics, GPS antenna leads, medical imaging equipment, 5G test benches, and high-temperature RF system internal wiring.
Technical Summary
| Parameter | Specification (Typical) |
| Impedance | 50 ± 2 Ohm |
| Max Frequency | 8.0 GHz (and higher depending on length) |
| Velocity of Propagation | 69% – 70% |
| Capacitance | ~29.0 pF/ft |
| Attenuation @ 400MHz | ~5.5 dB / 100ft |
| Operating Temp | -55°C ~ +200°C |
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