雙層手征介質(zhì)板中電偶極天線的輻射特性
THE RADIATION CHARACTERISTICS OF ELECTRIC DIPOLE ANTENNA IN TWO-LAYER CHIRAL SLABS BOUNDED BY A PERFECTLY CONDUCTING PLANE
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摘要: 本文首先給出了電流源激勵下雙層手征介質(zhì)中的并矢格林函數(shù)表達式。應(yīng)用鞍點積分法，導(dǎo)出了有金屬板襯底的雙層手征介質(zhì)中電偶極天線的輻射場表達式。分析了有、無空氣隙時手征導(dǎo)納對電偶極天線的方向圖，＝0方向的最大場強和諧振頻率的影響程度。結(jié)果表明，通過改變手征導(dǎo)納參數(shù)，可以有效地調(diào)節(jié)電偶極天線的輻射特性。
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關(guān)鍵詞:
- 電偶極天線;手征介質(zhì);手征導(dǎo)納;方向圖
Abstract: The formulas of dyadic Greens function for two-layer chiral electric dipole antenna are derived at first, and using the method of saddle-point integration,the expression of radiation field of electric dipole antenna is also derived. The ef fects of chirality admittance on the radiation pattern, maximum fields in the direction ＝0and resonance frequencies are examined. The results show that chiral media have potential applications in antenna areas. -
Engheta N, et al. Microwave and Optical Technology Letters, 1992,5(1):31-34.[2]Toacano A, et al. J. Elect. Waves and Applic., 1992, 6(5/6): 751-759.[3]尹文言,等.電波科學(xué)學(xué)報,1993,(1): 29-36.[4]鐘順時.微帶天線理論和應(yīng)用.西安:電子科技大學(xué)出版社,1991年6月. -
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