一種新穎的高增益圓極化背射天線
A CIRCULARLY POLARIZED BACKFIRE ANTENNA WITH HIGH GAIN
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摘要: 正 背射天線問世以來,已有許多文獻報道。利用十字交叉振子饋源和平板式小反射器組成的圓極化背射天線也有報道,但其軸比和增益等電特性不夠理想,而且還要用功分器和相移網(wǎng)絡,結構顯得復雜。 本文簡要介紹一種根據(jù)作者提出的等效反射面理論研制的結構新穎的圓極化背射天線。采用了雙模迭加、并聯(lián)饋電、加寬的邊環(huán)和表面波反射圓盤等技術措施,從而使天線的性能得到很大提高。實驗結果表明:所設計天線在中心頻率上增益為17.5dB
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關鍵詞:
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]馬義明,宋錫明,電訊工程,1978年,第4期,第20頁.[6]宋錫明,林昌祿,成都電訊工程學院學報,1981年,第1期第75頁.[7]林昌祿,同上,1979年,第1期,第97頁.[8]林昌祿,宋錫明,電子學通訊,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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