Improvement of Antenna Radiation Efficiency by the Suppression of Surface Waves
Homayoon Oraizi, Bahram Rezaei
DOI: 10.4236/jemaa.2011.33013   PDF    HTML   XML   7,175 Downloads   12,197 Views   Citations


The characteristics of coplanar waveguide (CPW) fed ring antennas (such as gain, efficiency and polarization purity) are degraded by the dielectric losses and excitation of surface waves on the substrates. To counteract such effects, we propose to remove some portions of the substrate in the vicinity of the metallic patches, which effectively eliminates the conditions for the generation of surface waves. The proposed technique is applied to a CPW-fed ring antenna and a prototype model is fabricated. The measurement data and the computer simulation results agree well and indicate the efficacy of the technique for the improvement of antenna gain and efficiency.

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H. Oraizi and B. Rezaei, "Improvement of Antenna Radiation Efficiency by the Suppression of Surface Waves," Journal of Electromagnetic Analysis and Applications, Vol. 3 No. 3, 2011, pp. 79-83. doi: 10.4236/jemaa.2011.33013.

Conflicts of Interest

The authors declare no conflicts of interest.


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