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The 1-1/4" low-loss annular corrugated copper coaxial cable primarily consists of an inner conductor, an insulating layer, an outer conductor, and a sheath. The inner conductor typically employs a copper material with high conductivity to ensure rapid signal transmission. The insulating layer utilizes high-quality insulating materials to minimize signal attenuation and interference. The outer conductor is typically a copper tube designed with a corrugated structure, which not only enhances the flexibility of the cable but also effectively reduces loss.
| Structure parameters | ||
| Item | Material | Diamenter (mm) |
| Diameter Over Dielectric | Foam PE | 34.06 |
| Diameter Over Jacket | PE | 39.62 |
| Inner Conductor OD | Copper-clad aluminum wire | 14.02 |
| Outer Conductor OD | Corrugated copper | 36.06 |
| Nominal Size | 1-1/4 in | |
| Performance parameters | |||
| Capacitor | 72pF/m | ||
| Impedance | 50ohm | ||
| Transmission rate | 92% | ||
| DC Resistance, Inner Conductor | 1.74 ohms/km | ||
| DC Resistance, Outer Conductor | 0.75 ohms/km | ||
| DC Test Voltage | 8500 V | ||
| Operating Frequency Band | 1-4000 MHz | ||
| Inductance | 0.187 µH/m | ||
| Insulation Resistance | 100000 MOhms-km | ||
| Jacket Spark Test Voltage (rms) | 10000 V | ||
| Peak Power | 180 kW | ||
| Working temperature range | -70～+85℃ | ||
| Bending radius | 203.2mm | ||
| ROHS/CE/FCC | YES | ||
| VSWR/Return Loss | Frequency Band | VSWR | Average Power |
| 680–800 MHz | 1.13 | 24.3 | |
| 800–960 MHz | 1.13 | 24.3 | |
| 1700–2200 MHz | 1.13 | 24.3 | |
As an important signal transmission medium, 1-1/4 inch coaxial cable faces challenges such as attenuation, standing wave ratio, mechanical properties, and electromagnetic interference. However, through material improvement, structural optimization, connection technology enhancement, and standardized installation and maintenance, its performance and reliability can be effectively improved. In the future, with the application of new materials and technologies and the development of intelligence, 1-1/4 inch coaxial cable will play a more important role in the field of communication and broadcasting, meeting the transmission needs of higher frequencies and greater capacities.
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