信号时域提取方法结合时域有限差分法分析传输线馈电的微波元件
ANALYSIS OF MICROWAVE COMPONENTS FED BY THE TRANSMISSION LINES WITH A METHOD OF SIGNAL EXTRACTION IN TIME DOMAIN IN COMBINATION WITH FDTD
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摘要: 本文提出了一种信号时域提取方法,对于非色散传输线馈电的微波元件,利用这一方法,从时域模拟获得的总场响应中提取馈线参考面上的时域入射波和反射波,进而得到其频域特性。与传统方法相比,它可以避免通过时域有限差分法直接求解入射波和反射波,因此可以减少计算时间和计算机内存。矩形微带天线的数值模拟表明,这种方法的计算精度与传统方法完全一致。Abstract: A method of signal extraction in time domain is proposed in this paper, by means of which, the time-domain incident wave and reflected wave on the reference plane of the feeder can be extracted from the total-field responses obtained from the time-domain simulation for the microwave components fed by the nondispersive transmission lines, furthermore, its frequency-domain parameters can also be acquired. By comparison with traditional methods, it can avoid to directly compute the time-domain incident wave and reflected wave using the finite-difference time-domain method, so computation time and storage can be reduced. The numerical simulations of rectangular microstrip antenna show that the computation precision of this method is the same as that of traditional methods.
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