Semi-Finished Coaxial Cable RG7
1. PHYSICAL CONSTRUCTION
| STANDARD SHIELD | TRI – SHIELD | QUAD – SHIELD | ||
| CONDUCTOR | MATERIAL | BC (Solid Bare Copper)/ CCA (Copper-Clad Aluminum)/ CCS (Copper-Clad Steel)/ CCAM (Copper-Clad Aluminum Magnesium) | BC / CCA / CCS / CCAM | BC / CCA / CCS / CCAM |
DELECTRIC | MATERIAL | FOAMED PE | FOAMED PE | FOAMED PE |
SHIELD | CONSTRUCTION | FOIL + BRAID | FOIL + BRAID + FOIL | (FOIL + BRAID）x2 |
FOIL MATERIAL | AL FOIL / CU FOIL | AL FOIL / CU FOIL | AL FOIL / CU FOIL | |
| BRAID MATERIAL | BC / CCA / AL / TC | BC / CCA / AL / TC | BC / CCA / AL / TC | |
BRAID COVERAG | 40% — 95% | 40% — 95% | 60% / 40% | |
2. ELECTRICAL CHARACTERISTICS
| Parameter | Typical Value | Description |
|---|---|---|
| Characteristic Impedance | 75 ± 3 Ω | Standard impedance of coaxial cable |
| Capacitance | Approx. 50 pF/m | Capacitance per unit length |
| Nominal Velocity of Propagation | 85% | The ratio of the speed of an electrical signal propagating in a cable to its speed in a vacuum |
| Attenuation | About 4.2 dB/100m @ 100 MHz | Typical signal loss at 100 MHz per 100 meters |
| DC Resistance | Approx. 5.5 Ω/100m (Conductor) | DC resistance of conductor per 100 meters |
| Frequency Range | 5 MHz – 1000 MHz | Suitable for CATV, satellite, and long-distance RF transmission |
| Voltage Rating | 300 V | Dielectric voltage rating |
3. Application Scenarios
CATV Backbone Networks — Ideal for main distribution lines requiring low signal loss over long distances.
Satellite TV Systems — Suitable for high-frequency satellite signal transmission with stable performance.
Commercial RF Transmission — Used in commercial-grade RF systems needing high power handling and low attenuation.
Long-Distance Signal Distribution — Perfect for environments demanding consistent signal integrity over extended cable runs.
4. Packaging
Core Length: Typically supplied in 500-meter or 1000-meter coils, depending on customer requirements.
Packaging Type: Wound on wooden or plastic reels to protect the cable core during transportation and storage.
Weight per Reel: Approximately 18–22 kg per 500m reel (varies by conductor and insulation specifications).
Protection: Each reel is wrapped with protective plastic film or shrink wrap to prevent moisture and dust ingress.
