一种新颖的高增益圆极化背射天线
A CIRCULARLY POLARIZED BACKFIRE ANTENNA WITH HIGH GAIN
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摘要: 正 背射天线问世以来,已有许多文献报道。利用十字交叉振子馈源和平板式小反射器组成的圆极化背射天线也有报道,但其轴比和增益等电特性不够理想,而且还要用功分器和相移网络,结构显得复杂。 本文简要介绍一种根据作者提出的等效反射面理论研制的结构新颖的圆极化背射天线。采用了双模迭加、并联馈电、加宽的边环和表面波反射圆盘等技术措施,从而使天线的性能得到很大提高。实验结果表明:所设计天线在中心频率上增益为17.5dB
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关键词:
Abstract: In this paper, a new type of high-gain circular polarized backfire antenna is presented. It is developed on the basis of equivalent reflector method proposed by the author (1979, 1981). A eircular polarized wave is obtained by use of two orthogonal dipoles. The lengths of the two dipoles are so chosen that the real parts of their input admittances differ in 90. The transverse dimension of the antenna is 2.24, the axial dimension is 2, the weight of the complete antenna assembly is only 1.2 kg. The gain measured is 17.5dB, the axial ratio is 0.5 dB, VSWR is 1.18 at centre frequency. -
H.W .Ehrenspeck, Proc. IRE, 48(1960), 109.[2]H.W. Ehrenspeck, Proc. IEEE, 53(1965), 639.[3]E. D. Nielsen, IEEE Trans. on AP,AP-18(1970), 367.[4]AD-730616.[5]马义明,宋锡明,电讯工程,1978年,第4期,第20页.[6]宋锡明,林昌禄,成都电讯工程学院学报,1981年,第1期第75页.[7]林昌禄,同上,1979年,第1期,第97页.[8]林昌禄,宋锡明,电子学通讯,4(1982), 331.[9]Lin Changlu and Song Ximing, Short Bachfire Antenna Reseach, 1983 IEEE-APS Symposium and URSI Meeting Symposium Digest, pp. 138-141. -
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