矩形反射柱體近旁天線輻射特性的計(jì)算應(yīng)用幾何繞射理論
CALCULATION OF THE RADIATION CHARACTERISTICS OF ANTENNAS ADJACENT TO A RECTANGULAR CYLINDER REFELECTOR BY GTD
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摘要: 本文用幾何繞射理論分析計(jì)算了矩形反射柱體近旁偶極子和雙環(huán)天線的水平輻射特性。研究了到達(dá)場(chǎng)點(diǎn)的直達(dá)波、反射波和柱體稜邊各次繞射波之間的量值關(guān)系。分析了柱體邊長(zhǎng)、天線與柱體之間的相對(duì)位置和天線的饋電方式對(duì)合成場(chǎng)強(qiáng)方向圖的影響。計(jì)算結(jié)果表明,需要對(duì)天線系統(tǒng)的有關(guān)參數(shù)進(jìn)行優(yōu)化設(shè)計(jì),以得到最佳的全向輻射特性,本文的分析方法和結(jié)果為這類(lèi)天線系統(tǒng)的優(yōu)化設(shè)計(jì)提供了手段和依據(jù)。
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關(guān)鍵詞:
Abstract: In this paper, the horizontal radiation characteristics of dipole and loop antennas adjaeent to a rectangular cylinder reflector are calculated by the application of GTD. The magnitudes of the direct field, the reflected field and the diffracted field from the edges of the cylinder at the field point are calculated and compared. The effects of the dimension of the cylinder, of the relative position of the antennas with respect to the cylinder and of the method of feeding to the resultant field pattern are analyzed. Using the method described, optimum design can be carried out to obtain the optimum omnidireetional radiation charqacteristics of antennas with reflector of this kind. -
逺藤敬二等,アンテナエ學(xué),日刊工業(yè)新聞社,東京,1969.[2]G. L. James, Geometrical Theory of Diffraction for Electromagnetic Waves, Peter Peregrinus Ltd.,Stevenage, UK and New York, 1977, pp. 115-159.[3]R. G. Kouyoumjian, The Geometrical Theory of Diffraction and Its Application, in Numerical and Asymptotic Techniques Electromagnetics, ed. by R. Mittra, Springer-Verlag Berlin, Heidelberg, New York, 1975, pp. 166-217.[4]R. G. Kouyoumjian and P. H. Pathak, Proc. IEEE, 62(1974), 1448.[5]H. Bach, Engineering Application of the Geometrical Theory of Diffraction, in Modern Topics in Electromagnetics and Antennas, ed. by E. J. Maanders and R. Mittra, Peter Peregrinus Ltd., Stevenage, England, 1977, pp. 5.1-5.87. -
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