Product introduction
Product Introduction
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Cable: RG178 RF Feeder Coaxial Cable
Interface Type: TNC
Cable length: 5cm ~200cm (length can be customized)
RG178 RF coaxial cable parameter description
1. Core parameters
parameter | Typical values | standard |
characteristic impedance | 50 Ω | Standard RF systems match the impedance |
Outside diameter | 1.8mm±0.10mm | Ultra-fine design for compact spaces |
Central conductor | 7×0.06mm silver-plated copper-clad steel | High flexibility, silver plating layer improves high-frequency conductivity |
Insulation | Solid Teflon (PTFE) | Loss tangent 0.0004 |
shielding | Double shielding | (1) Silver-plated copper braided mesh (≥92% coverage) (2) Aluminum foil longitudinal wrap (100% covered.) |
jacket | Fluorinated ethylene propylene copolymer (FEP) |
|
Frequency range | DC ~ 6 GHz | Common frequency bands 0-3 GHz |
attenuation | 100 MHz:2.0 dB/100m 1 GHz:6.2 dB/100m 3 GHz:11.8 dB/100m 5 GHz:16.4dB/100m 10 GHz:26.0 dB/100m |
25% lower than RG174 (@1GHz) |
Voltage VSWR | ≤ 1.35:1 (0-6 GHz) | Requires SMA or MCX connectors |
Minimum bend radius | Static: 5 mm (5 ×OD) Dynamic: 10 mm (10 ×OD) | High flexibility, suitable for repeated bending |
Maximum pulling force | 45 N (short-term) / 15 N (long-term) | Mounting tension limit |
Operating temperature | -55°C ~ +200°C | Instantaneous temperature resistance +260°C (5 minutes) |
Speed of transmission | 69% speed of light | Latency 4.8 ns/m |
Shielding efficiency | ≥ 85 dB (1 GHz) | 满足 MIL-STD-461F RE102 |
Voltage level | 1,000 Vrms (peak) | Insulation withstand voltage ≥3 kV DC |
capacitance | 29.5 pF/ft (96.8 pF/m) | It conforms to the 50Ω transmission line characteristics |
2. Typical applicable scenarios
High-frequency test instruments (oscilloscope probes, spectrometer cables) UAVs/robots (lightweight image transmission signal cables)
Medical equipment (endoscopes, high-frequency wires inside monitors)
Military/Aerospace Electronics (Airborne Equipment, Satellite Communication Modules)
Micro RF connectors (SMA, MCX, IPEX interface patch cords)
Selection guide
1. Specifications and characteristics of commonly adapted cables
Model | Outside diameter | Central conductor | 3GHz loss | peculiarity | Applicable scenarios |
RG-174 | 2.8mm | 7*0.16mm | 0.82dB/m | Flexible, easy to install, and low cost | Consumer electronics |
RG-316 | 2.6mm | 7*0.1mm | 0.84dB/m | High temperature resistance, military industry standards | High temperature environment, test instruments |
Micro foamed PE wire | 1.5~2.2mm | 0.3~0.5mm | 0.50dB/m | High frequency loss is low | 5G/Wi-Fi |
Semi-steel wire | 1.0~3.0mm | Solid copper | 0.30dB/m | Relatively stable and good shielding | Test calibration, mmWave front |
2. Comparison of key parameters and selection logic
2.1 Electrical performance priority
parameter | RG-174 | RG-316 | Foamed PE wire | effect |
Attenuation @6GHz | 1.8dBm/m | 1.7dBm/m | 0.9dBm/m | High-frequency signal integrity |
Shielding efficiency | 70dB | 90dB | >90dB | Anti-interference ability |
Impedance stability | ±3Ω | ±2Ω | ± 1Ω | Reflected signal suppression |
2.2 Mechanical and environmental adaptability
parameter | RG-174 | RG-316 | Foamed PE wire |
Minimum bend radius | 15mm | 25mm | 30mm |
Temperature range | -40℃ ~ +85℃ | -65℃ ~ +200℃ | -50℃ ~ +85℃ |
tensile strength | medium | Tall | Low (easily damaged) |
3. Typical application scenarios are matched with cables
3.1 Consumer Electronics (Bluetooth/Wi-Fi)
Cable: RG-174
Reason: Cost sensitive, frequency ≤ 5GHz, short length (<0.3m) and controllable loss.
3.2 Test Instrument Jumper (Vector Network Analyzer)
Cable: RG-316 or low-loss foam cable (e.g. Times LMR-200)
Reason: It needs to be resistant to plugging and unplugging, low loss (high calibration accuracy requirements).
3.3 Vehicle radar/5G small cell station
Cable: PTFE insulated foam wire (e.g. Gore G-FLEX 150)
Reason: 6~24GHz low loss requirements, outer diameter ≤2mm for easy wiring.
3.4 Military equipment
Cable: RG-316 (Mi-Label MIL-DTL-17)
Reason: Resistant to extreme temperatures, vibration, and high shielding requirements.
4. Supplementary instructions
4.1 Outer diameter mismatch: MCX connectors usually support 1.0~3.0mm wire diameter, which needs to be customized beyond the range (such as micro wires require a dedicated MCX head).
4.2 High frequency loss: RG-174 has 2 times higher loss than foamed PE wire at 6GHz, and is avoided for long-distance transmission.
4.3 Phase stability: For phase-sensitive applications (phased arrays), prefer semi-rigid wires or phase-stabilized cables (such as Huber+Suhner S100).
4.4 Connector Grade: Gold-plated contacts MCX (non-nickel plated) are selected to ensure a > 500 plugging and unmating life.
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