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FDTD 방법을 이용한 Microstrip 특성 해석에 관한 연구
백정기,손창수,박재홍,윤성현 東亞大學校 1994 東亞論叢 Vol.31 No.1
The important electrical paramenters for microstrip line-design are effective dielectric constant and characteristic impedance. In this paper, a direct three-dimensional finite-difference time-domain(FDTD) method is applied for the full-wave analysis of microstrip line and from the time-domain results, freguency-dependent effective dielectric constant and characteristic impedance are calculated by the Fourier transform and compared with the published results. When H is greater then W, FDTD differ from empirical formaula about 2.5%. When W is greater then H, FDTD has difference about 0.5% But, at the high freguency, FDTD is well agreed with empirical method. Also, scattering coefficient of the microstrip discontinuity is calculated over a large freguency range. Further investigation on different computer-memory-saving scheme will make this methold more suitable for CAD purposes.