Semi-Finished Coaxial Cable – RG7 CCS/96/CCA
1. Cable Structure (No Outer Jacket)
| Layer | Material | Approximate Diameter |
|---|---|---|
| Inner Conductor | Copper-Clad Steel (CCS), Ø ~1.13 mm | ~18 AWG |
| Dielectric Insulation | Gas-injected Foamed Polyethylene (FPE) | ~5.2–5.4 mm |
| First Shield (Foil) | Bonded Aluminum-Polyester Tape (100%) | — |
| Second Shield (Braid) | 96 strands Copper-Clad Aluminum (CCA), ~60–65% coverage | — |
| Outer Jacket | Not included (semi-finished format) | — |
Outer Diameter (semi-finished core): ~6.0 mm
Finished OD (with jacket): ~7.8–8.2 mm (depends on jacket type)
2. Electrical Performance
| Parameter | Typical Value |
|---|---|
| Impedance | 75 ohms |
| Capacitance | ~54 pF/m |
| Velocity of Propagation | ~85% (FPE) |
| Attenuation @ 100 MHz | ~6.6–6.8 dB/100m |
| Shielding Effectiveness | Good to High (foil + 96-wire braid) |
| Mechanical Durability | High (due to CCS core) |
3. Key Features
CCS Inner Conductor: Strong, cost-effective core ideal for long installation runs
96-Wire CCA Braid: Provides high shielding performance at lower weight and cost than copper
100% Aluminum Foil Shielding: Maintains consistent shielding against signal leakage and EMI
Semi-Finished Core: Ready for customized jackets (e.g., PE, PVC, LSZH, dual-layer, or UV-resistant)
4. Application Scenarios
CATV trunk and feeder lines
Satellite and broadband distribution in multi-unit buildings
OEM manufacturing for export or region-specific jacket finishing
Moderate-to-high EMI environments requiring better protection than 48/64-wire braid variants
5. Limitations
Slightly higher attenuation than copper-core cables
CCA braid is more cost-effective but less flexible and durable than copper braid
Outer jacket required before installation in field environments
6. Comparison Table – RG7 Semi-Finished Cores
| Variant | Conductor | Braid Shield | Shield Coverage | Attenuation @100 MHz | Shielding Level | Cost |
|---|---|---|---|---|---|---|
| CCS/96/CCA | CCS | CCA x 96 | ~60–65% | ~6.6–6.8 dB/100m | Good–High | 💲💲 |
| CCS/64/CCA | CCS | CCA x 64 | ~40–45% | ~6.8–7.0 dB/100m | Moderate | 💲💲 |
| CCS/48/CCA | CCS | CCA x 48 | ~30–35% | ~7.2–7.5 dB/100m | Basic | 💲 |
| CU/96/CCA | Copper | CCA x 96 | ~60–65% | ~6.3–6.5 dB/100m | Very High | 💲💲💲 |
