Study on Crosstalk Between Space Transient Interference Microstrip Lines Using Finite Difference Time Domain Method
Keywords:
Carson reciprocity theorem, crosstalk, FDTD, space transient interferenceAbstract
In the paper, a Carson reciprocity theorembased numerical method is proposed to analyze the crosstalk of space transient interference microstrip lines. Firstly, the proposed method is realized via solving the coupling voltage between the space transient interference and the microstrip lines by the use of Carson reciprocity theorem. Then the crosstalk between the microstrip lines caused by the coupling voltage is studied based on the finite difference time domain (FDTD) method. Lastly, compared with the Baum-Liu-Tesche (BLT) equation method, the proposed method reduces the computational complexity without solving the complex scattering field. In this paper, coupling between a dipole and a microstrip line will be considered and its coupling model will be given. FDTD and the parasitic parameter model between the microstrip lines are used to get the crosstalk. In addition, the crosstalk between the microstrip lines caused by the space transient interference is analyzed in comparison with the impedance match and mismatch of the terminals. The simulated results show that the voltages of the reflection and crosstalk which are on the victim line with mismatched loads are larger than that with matched loads, and the fluctuate time of the signal on the victim line with mismatched loads is over two times than that with matched loads, which help to verify the effectiveness of the proposed method. Moreover, when we analyze the electromagnetic problems on the surface of the arbitrary shaped ideal conductor, the image method is unavailable because the surface of ideal conductor is not infinite, while the analytic method is unavailable either, on account of the boundary of the ideal conductor is irregular. So the conventional approach is difficult to solve the problems, but the proposed method can work well for the problems due to the fact that it has nothing to do with the boundary shape, and it is only connected with the source and its field. Therefore, the proposed method is suitable for a wide range.
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