1/2-inch Coaxial Cable Technology Analysis

As a key transmission medium of modern mobile communication systems, 1/2-inch coaxial feeder cable is widely used in many indoor and outdoor coverage projects. Its technical characteristics directly affect the quality of signal transmission. The cable adopts a layered mechanical structure design. The core is a solid copper or copper-clad aluminum inner conductor with a diameter of 4.8mm, combined with a physical foamed polyethylene insulation layer (dielectric constant ≤1.25), which effectively reduces transmission loss. The outer conductor adopts an innovative annular corrugated copper tube structure, which achieves a minimum bending radius of 50mm while maintaining an electromagnetic shielding effectiveness of ≥100dB. The outer black low-smoke halogen-free (LSZH) sheath not only passes the UL flame retardant certification, but also has anti-ultraviolet aging properties, and can adapt to harsh environments from -55℃ to +85℃.

In terms of electrical performance, this 50Ω impedance feeder cable exhibits excellent transmission characteristics: the attenuation in the 100MHz frequency band is only 4.95dB/100m, and even in the 900MHz frequency band it is controlled within 7.33dB/100m. Its 88% signal propagation rate and 25.9kW peak power capacity make it an ideal choice for high-frequency scenarios such as 5G base station AAU connection and satellite intermediate frequency transmission. Actual measurements show that the standing wave ratio of VSWR ≤ 1.2:1 can be stably maintained in the frequency band below 3GHz.

Installation and construction must strictly follow technical specifications: anti-vibration hardware should be installed every 1.5 meters when laying overhead, and the area occupied by pipeline laying should not exceed 40% of the pipe diameter. Special tools should be used to assemble the joints to ensure a tightening torque of 27-30N·m, and a three-layer sealing process of "insulating tape-waterproof tape-insulating tape" should be adopted, in which the waterproof tape should be stretched to twice its original length and maintain a 50% overlap rate. The maintenance cycle recommends replacing the outdoor section cable every 5 years, and the corrosive environment should be shortened to 3 years. Currently, SYMAIR mainstream models such as FC50-12-LSZH-01 HCAAYZ-50-12 have been widely used in global communication infrastructure construction projects.