介質(zhì)加蓋高增益微帶天線的優(yōu)化
OPTIMUM DESIGN OF HIGH GAIN MICROSTRIP ANTENNAS COVERED WITH DIELECTRIC LAYERS
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摘要: 本文提出了利用點(diǎn)源增益優(yōu)化方法設(shè)計(jì)介質(zhì)加蓋的高增益微帶天線的方法,所確定的各介質(zhì)層的電厚度能保證天線取得最高的增益。同時(shí)優(yōu)化計(jì)算量也成倍減少。所設(shè)計(jì)的一個(gè)兩層介質(zhì)加蓋微帶天線的最高增益達(dá)到16.8dB。分析結(jié)果還表明,在一定條件下,增益和效率是可以兼顧的,用加蓋的方法提高天線增益的同時(shí)仍可使天線具有較高的輻射效率。
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關(guān)鍵詞:
- 微帶天線; 高增益; 介質(zhì)加蓋
Abstract: In this paper an optimum design method for high gain microstrip antenna covered with dielectric layers is proposed. In the method, the moment method and optimization for the gain of a point source model are used to find the optimum thickness for every dielectric layer, so that the highest antenna gain can be acquired. Besides, the use of point source model much decreased the computation needed in the method. The calculated results also show that the high gain microstrip antennas covered with dielectric layers can still have rather high radiation efficiency. -
張均,等.微帶天線理論與工程.北京:國(guó)防工業(yè)出版社,1988年7月.[2]Jackson D R, Alexoponlog N G. Gain enhancement methods for printed circuit antennas. IEEE Trans. on Antennas and Propagat., 1985, AP-33(3): 976-987.[3]Yang H Y, Alexopoulog N G. Gain enhancement methods for printed circuit antennas through multiple superstrates. IEEE Trans. on Antennas and Propagat., 1987, AP-35(7): 860-863.[4]孟慶翔.矩形微帶天線的特性分析及有關(guān)并矢格林函數(shù)的研究:[博士論文].華東師范大學(xué),1990.[5]Bahl, et al. Design of microstrip antennas covered with a dielectric layer. IEEE Trans. on Antennas and Propagat., 1982, AP-30(2): 314-318. -
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