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Matlab code for calculating impedance of inner circle and outer square coaxial cable by boundary ele
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The code divides the boundary of the coaxial cable into small units, calculates the electric field of each unit to a certain position, calculates the electric field distribution when the voltage inside and outside the coaxial cable is 1V, and calculates the charge on the surface of the coaxial cable, so as to obtain its unit capacitance, and then obtains the impedance according to the formula. The impedance of coaxial cables with different sizes is calculated and compared with the results calculated by other methods. The results show that the accuracy is better and the computational complexity is lower. At the same time, the impedance formula related to size is obtained by learning, and the accuracy of the formula is verified by simulation. The experimental report is attached.
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