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trb179-triaxial-cable---75-ohm-guarded-coax, trb179-triaxial-cable---75-ohm-guarded-coax, /triaxial-coaxial-cable
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Technical & Material: 75Ω dual-shield PTFE/FEP cable for femtoamp precision
Application & Effect: Ideal for semiconductor I-V/C-V testing with zero dielectric leakage
Certifications & OEM Support: ISO/ROHS compliant with 100% factory-tested quality
The TRB179 triaxial cable engineered by Zhenjiang Worldpeak Communication Co., Ltd. is a premium 75 ohm guarded coaxial cable designed for high-precision, low-noise measurement applications. Built with a sophisticated dual-shield architecture, the TRB179 triaxial cable isolates critical test signals from environmental electromagnetic interference (EMI) and eliminates dielectric leakage currents. Featuring a durable 3.50 mm FEP outer jacket and high-purity PTFE dielectrics, this low noise measurement cable provides exceptional thermal stability across operating environments ranging from -55°C to +200°C.
Engineered specifically for semiconductor parametric testing, electrometer setups, and low-current research instrumentation, the TRB179 guarded cable delivers femtoamp-level signal integrity. Zhenjiang Worldpeak Communication Co., Ltd. provides high-reliability TRB179 triaxial cable configurations tailored to meet stringent B2B OEM requirements, ensuring precision signal delivery in critical test systems worldwide.
The TRB179 triaxial cable represents an advanced transmission line solution where conventional coaxial cabling falls short. While standard coaxial cables feature a single center conductor and a single ground shield, the TRB179 triaxial cable integrates a secondary concentric dielectric and braid layer to form a true three-conductor system.
At the core of the TRB179 guarded cable is a 7 x 0.10 mm silver-plated copper-clad steel (SPCCS) conductor, optimized to maintain a consistent 75 ohm characteristic impedance alongside superior mechanical flexibility. The inner PTFE dielectric insulates the center signal line from the inner silver-plated copper shield braid. When connected to high-precision measurement instrumentation, this inner shield functions as an active guard driven at the exact electrical potential of the center conductor.
Surrounding the inner guard shield is a secondary outer PTFE dielectric, capped by a high-density outer silver-plated copper shield braid and a robust 3.50 mm FEP protective jacket. By driving the inner shield at equal potential, the effective voltage differential across the inner dielectric drops to virtually zero. This mechanism neutralizes internal cable leakage paths, enabling test engineers to achieve repeatable, accurate readings down to the femtoamp range without signal distortion or background noise interference.
Precision Dual-Shield Guarded Architecture: The TRB179 triaxial cable utilizes a dual-braid construct featuring separate inner guard and outer ground shields to eliminate signal leakage.
Low Noise Signal Transmission: Designed as a high-performance low noise measurement cable, the TRB179 guarded cable minimizes triboelectric noise generated by mechanical flexing and vibrations.
Premium PTFE & FEP Dielectric Insulation: Features high-grade PTFE internal insulation and a chemically inert 3.50 mm FEP outer jacket to preserve dielectric constant and structural integrity.
Wide Operating Temperature Range: Operates reliably across extreme thermal conditions from -55°C to +200°C without compromising mechanical flexibility or electrical performance.
75 Ohm Impedance Matching: Optimized for high-frequency low-current instruments, C-V characterization, and guarded 75 ohm video test applications.
Industry Standard Connector Compatibility: Fully compatible with standard 3-Lug TRB and 2-Lug Twinax connector systems for seamless integration into existing test environments.
| Parameter | Specification | Functional Notes |
|---|---|---|
| Product Model | TRB179 Triaxial Cable | Zhenjiang Worldpeak Communication Co., Ltd. |
| Impedance | 75 Ohm | Characteristic System Impedance |
| Inner Conductor | 7 x 0.10 mm SPCCS | High-flexibility center conductor |
| Inner Dielectric | 1.30 mm PTFE | Isolates signal line from inner guard braid |
| Inner Shield | 1.60 mm Silver-Plated Copper Braid | Active driven guard shield layer |
| Outer Dielectric | 2.20 mm PTFE | Isolates inner guard from outer ground braid |
| Outer Shield | 2.80 mm Silver-Plated Copper Braid | EMI grounding and guard return shield |
| Outer Jacket | 3.50 mm FEP | Chemical, thermal, and mechanical jacket |
| Velocity of Propagation | 70% | Reference signal velocity |
| Capacitance | 67 pF/m | Low baseline capacitance |
| Attenuation @ 100 MHz | 52 dB/100m | Signal attenuation benchmark |
| Attenuation @ 400 MHz | 110 dB/100m | High-frequency signal attenuation |
| Operating Temperature | -55°C to +200°C | Extreme thermal stability rating |
| Minimum Bend Radius | 18 mm | Structural flexibility threshold |
| Nominal Cable Weight | 0.025 kg/m | Lightweight profile |
Standard coaxial cables suffer from dielectric leakage current caused by potential differences between the center signal conductor and the outer grounded braid. When measuring sub-nanoamp or femtoamp currents, this dielectric leakage introduces severe measurement errors. The TRB179 triaxial cable solves this inherent limitation through active guarding. By driving the inner shield of the TRB179 guarded cable to match the potential of the center conductor, voltage drop across the primary dielectric drops to near zero, effectively eliminating leakage currents.
While twinaxial cables employ two center conductors for differential balanced signaling, the TRB179 triaxial cable relies on a single center conductor surrounded by concentric isolated shields. Twinax cable is designed for high-speed differential signal paths, whereas the TRB179 triaxial cable is optimized for single-ended, highly isolated, guarded measurements in low-current test environments.
Mechanical motion and friction between dielectric layers and shield braids generate static charges known as triboelectric noise. As a specialized low noise measurement cable, the TRB179 guarded cable incorporates high-purity PTFE interfaces that suppress charge generation. This structural design ensures that cable movement during manual probing or automated station operation does not generate spurious current spikes that ruin sensitive data points.
Semiconductor Parametric Testing: Applied extensively as a guarded interconnect between Source-Measure Units (SMUs) and wafer probe stations to perform femtoamp-level current-voltage (I-V) characterization.
Capacitance-Voltage (C-V) Characterization: Serves as a 75 ohm triaxial cable connection for precision C-V meters measuring semiconductor junction capacitance without stray cable parasitic influences.
High-Impedance Electrometer Measurements: Enables low noise measurement cable routing for electrometers, sub-picoammeters, and high-impedance voltmeters where input bias currents must be controlled.
Research Laboratory Instrumentation: Used in advanced physics, nanotechnology, and materials science laboratories requiring maximum signal isolation from stray magnetic and electrostatic fields.
Zhenjiang Worldpeak Communication Co., Ltd. provides complete OEM and B2B manufacturing support for global instrument manufacturers, test engineers, and system integrators:
Custom Cable Assemblies: Zhenjiang Worldpeak Communication Co., Ltd. delivers factory-terminated assemblies equipped with 3-Lug TRB connectors, BNC triax adapters, or customized connector terminations tailored to specific instrument models.
Rigorous Quality Assurance: Every cable assembly produced by Zhenjiang Worldpeak Communication Co., Ltd. undergoes strict 100% testing for shield-to-shield isolation resistance, signal continuity, and dielectric withstand strength.
Scalable Bulk Ordering & Packaging: Zhenjiang Worldpeak Communication Co., Ltd. offers custom spool lengths, anti-static individual packaging, custom jacket colors, and sequential meter marking for bulk industrial orders.
A: The TRB179 triaxial cable includes a second dielectric and an inner guard shield. When driven at the same electrical potential as the center conductor, the TRB179 guarded cable eliminates voltage differential across the inner dielectric, stopping leakage currents from corrupting measurements below 1 nA.
A: The TRB179 triaxial cable is fully compatible with standard 3-Lug TRB, 2-Lug Twinax, and specialized BNC triaxial connectors commonly found on high-precision electrometers and SMU interfaces.
A: For proper guarding setup, connect the inner shield of the TRB179 triaxial cable directly to the instrument guard output, and connect the outer shield braid to chassis ground. Connecting the inner guard directly to ground will defeat the guarding function.
A: Yes, Zhenjiang Worldpeak Communication Co., Ltd. offers complete OEM customization, providing custom assembly lengths, specialized labeling, anti-static packaging, and tested connector configurations to support volume B2B orders.
