What's RG402 Coaxial Cable

RG402 is a military-standard semi-rigid 50Ω coaxial cable optimized for 34GHz high-frequency RF systems. This document details its physical structure, electrical indexes, environmental tolerance and selection standards.

I. Physical Characteristics

Construction

Center Conductor: Solid silver-plated copper wire, 0.93mm diameter.

Dielectric Insulation: Solid PTFE, 3.00mm thickness with stable low dielectric constant.

Shielding Layer: Seamless annealed copper tube for full 100% shielding coverage.

Outer Jacket: Optional FEP blue jacket, 4.10mm outer thickness.

Dimensions

Outer Diameter: 3.58mm; Dielectric Inner Diameter: 3.00mm.

Wire Gauge: Solid single-strand inner conductor for high conductivity.

SMA Connector Male Soldering Straight For RG402, .141 Coaxial Cable

II. Electrical Performance

Characteristic Impedance: Strict 50 Ohm matching for microwave transmission.

Attenuation: Superior low loss; ~0.37dB/m@1GHz, max usable frequency 34GHz.

Insertion Loss: Minimal insertion loss preserves signal power in high-power RF links.

VSWR: Low standing wave ratio for seamless impedance matching across full band.

Shielding Effectiveness: Zero RF leakage from solid copper outer conductor, superior to braided cables.

III. Environmental Adaptability

Operating Temperature: -55℃ to +125℃, compatible with aerospace temperature cycles.

Protection Level: FEP jacket offers chemical resistance against lubricants and solvents.

Mechanical Strength: Semi-rigid structure holds custom bent routing; stable mechanical performance under vibration.

Type-N Connector Male Soldering Straight For RG402,.141 Coaxial Cable

IV. Selection Guidelines

Application Requirements: Designed for fixed internal wiring of radar, test instruments and military communication hardware, short-to-medium distance high-frequency transmission.

Matching Connectors: 2.92mm, SMA, N-type high-power RF connectors.

Electrical Verification: Check power handling (450W CW@1GHz) and dielectric withstand voltage (5kVrms).

Environmental Suitability: Solid tube version for low-vibration fixed layouts; jacketed type for humid industrial cabinets.

RG402 semi-rigid coax meets MIL-C-17 military standards, combining low attenuation, high power capacity and zero signal leakage. It is the primary choice for precision microwave test equipment and airborne RF system internal wiring.