Product introduction
| Product Introduction |
| SMA-KF2 hole flange female head to third-generation terminal |
| Cable: RF0.81 ultra-fine coaxial cable (outer diameter 0.81mm) |
| Interface Type: SMA |
| Cable length: 5cm~200cm (length can be customized) |
| RF0.81 Ultra-fine coaxial cable parameter description | ||
| 1. Core parameters | ||
| parameter | Typical values | standard |
| characteristic impedance | 50Ω ± 2Ω | The standard impedance of millimeter wave systems |
| Outside diameter | 0.81±0.03mm | One of the industry's finest commercial coaxial lines |
| Central conductor | 1×0.16mm tinned copper-clad rigid wire | High tensile strength (breaking force ≥5N) |
| Insulation | Foam PE | Dielectric constant 1.55 (ultra-low loss key) |
| shielding | Aluminum-magnesium alloy foil + tinned copper wrapping layer | The coverage rate is >98%, and the shielding efficiency is >65dB@10GHz |
| Sheath material | Fluorinated ethylene propylene copolymer (FEP) | Ultra-thin wall thickness of 0.05mm, resistant to 200°C reflow soldering |
| Speed of transmission | 82% speed of light (VF=0.82) | Low latency transmission |
| Minimum bend radius | 3 mm (static) / 6 mm (dynamic) | Can be bent around the pen tip |
| 2. Frequency and attenuation | |||
| frequency | Attenuation (dB/m) | Comparison of Competitors (RG178) | Application scenarios |
| 1GHz | 0.95dB/m | 30% lower than RG178 | Bluetooth/Wi-Fi |
| 5GHz | 2.20dB/m | 33% lower | Wi-Fi 6/6E |
| 10GHz | 3.30dB/m | 45% lower | 5G mmWave front-end |
| 24GHz | 5.80dB/m | 50% lower | Vehicle radar module |
| 28GHz | 6.50dB/m | 52% lower | 5G FR2 base station antenna |
| 40GHz | 8.20dB/m | There are no direct competitors | Satellite communication terminals |
| 3. Electrical performance | ||
| parameter | Value | Test conditions |
| Maximum operating voltage | 300 V RMS (25°C) | Breakdown voltage ≥ 800V |
| Average power capacity | 5W | Thermal limit of the central conductor |
| capacitance | 95 pF/m | 1 MHz |
| 4. Mechanical and environmental characteristics | ||
| parameter | Value | Test conditions |
| Operating temperature range | -40℃~+150℃ | Short-term resistance to 200°C |
| tensile strength | ≥15N | IEC 61196 standard |
| Phase stability | ±0.5°/m@28GHz | Minimum requirements for phased array systems |
| Plugging and unplugging life | 100 times (dynamic bending scene) | IEC60512-9-3 |
| 5. Core application scenarios |
| 5G mobile phone millimeter wave antenna |
| Length: 50~150mm |
| Advantage: Replace LCP flexible board, cost reduction by 60% |
| Endoscope wireless image transmission module |
| Length: 200~300mm |
| Critical: Resistant to autoclaving (steam at 135°C) |
| UAV FPV image transmission system |
| Length: 100~200mm |
| Performance: 28GHz Loss <1.3dB (complete machine) |
| Military individual communication equipment |
| Length: ≤500mm |
| Reliability: Passed MIL-STD-810H vibration test |
| 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 mating 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, vibrations, and high shielding requirements. |
| 4. Supplementary instructions |
4.1 Outer diameter mismatch: MCX connectors usually support 1.0~3.0mm wire diameter, and customization is required 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 (e.g., Huber+Suhner S100). |
| 4.4 Connector Grade: Gold-plated contacts MCX (non-nickel plated) are selected to ensure a > of 500 mating and unmating life. |
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SMA-KF 2-hole flange female to third-generation terminal
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