Research on attenuation model of the communication leaky coaxial cable

In this paper, based on the equivalent circuit diagram of the leaky cable, the impedance and admittance of the leaky cable are calculated, and the mathematical model of the leaky cable is established. In the influence of external mode coupling, weak coupling coefficient is defined, and the transmission attenuation model of the leaky cable is obtained. The relation between attenuation and frequency is obtained by simulation, show that the attenuation increases with frequency. Through the experiment of the leaky cable, the consistency between the measured value of attenuation of cable and the attenuation model is obtained.