Performance Analysis of the Uni-Directional Radiation Equiangular Antenna over EBG Surface 


Vol. 40,  No. 8, pp. 1622-1630, Aug.  2015


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  Abstract

In this study, we used EBG(electromagnetic band gap) reflector to change bi-directional radiation of circular polarization into uni-directional radiation of equiangular spiral antenna. When the height of spiral arm from EBG reflector is 0.07 wavelength of the lowest operating frequency, the axial ratio of the circular polarization was deteriorated. In this paper, we analyzed the magnitude and the time phase difference of Eθ,EΦ that generates right hand circle polarization that is co-polarization at +z direction and proposed the improving condition for axial ratio at all related frequency range. As a result, we obtained that the axial ratio was below 3[dB] at range of 3 ~ 10[dB], the gain was improved about 3[dB] with comparison to bi-directional radiation at free space, and S11 was below -10[dB]at all related frequency range.

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  Cite this article

[IEEE Style]

S. H. Yoon and J. K. Kim, "Performance Analysis of the Uni-Directional Radiation Equiangular Antenna over EBG Surface," The Journal of Korean Institute of Communications and Information Sciences, vol. 40, no. 8, pp. 1622-1630, 2015. DOI: .

[ACM Style]

Sung Hyun Yoon and Jae Kwan Kim. 2015. Performance Analysis of the Uni-Directional Radiation Equiangular Antenna over EBG Surface. The Journal of Korean Institute of Communications and Information Sciences, 40, 8, (2015), 1622-1630. DOI: .

[KICS Style]

Sung Hyun Yoon and Jae Kwan Kim, "Performance Analysis of the Uni-Directional Radiation Equiangular Antenna over EBG Surface," The Journal of Korean Institute of Communications and Information Sciences, vol. 40, no. 8, pp. 1622-1630, 8. 2015.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880