UHF波段開槽天線寬帶阻抗特性分析
Analysis of wide-based impedance characteristics of tapered slot antenna in UHF band
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摘要: 該文采用時(shí)域有限差分法 (FDTD)對開槽天線在 UHF頻段的寬帶阻抗特性進(jìn)行了分析計(jì)算。文中給出了計(jì)算所得到的一個(gè)Vivaldi天線的寬帶駐波參數(shù)。通過與實(shí)驗(yàn)結(jié)果相比較可以看出,兩者比較吻合,從而證明該文采用的分析模型和處理方法是可行有效的。根據(jù)得到的結(jié)果,開槽天線的駐波比至少在2個(gè)倍頻程范圍內(nèi)變化不大,符合寬帶工作的要求。
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關(guān)鍵詞:
- 開槽天線; 時(shí)域有限差分法; 寬帶阻抗特性
Abstract: The finite difference time-domain method is used to analyse the wide-hand impedance characteristics in UHF band of the tapered slot antenna in this paper. And the SWR of a, Vivaldi antenna is calculated, is in good agreement with the experimental results. The results show that the methods of modeling in this paper are correct and valid. The antenna SWR, changes a little within two octaves, so this antenna can work in wide-baud held. -
P.J. Gibson, The Vivaldi aerial, Proc. 9th European Microwave Conf Brighton, U. K., 1979.101-105.[2]R. Janaswamy, D. H. Schaubert, Analysis ofthe tapered slot antenna, IEEE Trans. on AP, 1987.AP-35(9), 1058-1065.[3]周權(quán),郭開周,李學(xué)清,用時(shí)域有限差分法對縫隙漸變天線的瞬態(tài)電磁場分布,電子學(xué)報(bào),1995,23(3),49-54[4]J.P. Berenger, A perfectly matched layer for the absorption of electromagnetic waves, Journal of Computational Phys., 1994, 114(1), 185-200.[5]J.P. Berenger, Three-dimensional perfectly matched layer for the absorption of electromagnetic waves, Journal of Computational Phys., 1996, 127(2), 363-379.[6]王長清,祝西里,電磁場中的時(shí)域有限差分法,北京,北京大學(xué)出版社,1994,第六章.[7]X. Zhang, K. K. Mei, Time-domain finite difference approach to the calculation of the fiequencydependent characteristics of microstrip discontinuities, IEEE Trans. on MTT, 1988. MTT-36(12),1775-1787. -
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