Correction of Time Domain Measurement Error of Reflection Coefficient of Dielectric Plate

In the free space time domain measurement of die-lectric plate material reflection coefficient, a 16-element error model is introduced to correct the diffraction and scattering prob-lems caused by the finite size of dielectric plate. Firstly, the testing principle of time domain reflection measurement system is intro-duced, and the edge effect error caused by the limited size of die-lectric plate is analyzed. Then the calculation formula and correction principle of the 16-element error control model are given, and the measurement amplitude of the reflection coefficient of the single-layer dielectric plate is corrected, and the analytical solution is compared, and the error is less than 5%. The results show that the 16-element error model can effectively control the exper-imental errors in free space time domain measurement.