信號(hào)時(shí)域提取方法結(jié)合時(shí)域有限差分法分析傳輸線饋電的微波元件
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: 本文提出了一種信號(hào)時(shí)域提取方法,對(duì)于非色散傳輸線饋電的微波元件,利用這一方法,從時(shí)域模擬獲得的總場(chǎng)響應(yīng)中提取饋線參考面上的時(shí)域入射波和反射波,進(jìn)而得到其頻域特性。與傳統(tǒng)方法相比,它可以避免通過時(shí)域有限差分法直接求解入射波和反射波,因此可以減少計(jì)算時(shí)間和計(jì)算機(jī)內(nèi)存。矩形微帶天線的數(shù)值模擬表明,這種方法的計(jì)算精度與傳統(tǒng)方法完全一致。
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關(guān)鍵詞:
- 時(shí)域有限差分法; Fourier變換; 信號(hào)時(shí)域提取
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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