A novel Fabry-Perot resonant antenna with high aperture efficiency based on non-uniform design
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    Abstract:

    Due to the non-uniform Electromagnetic(EM) field distribution over the superstrate,the Fabry-Perot Resonant Antenna(FPRA) is normally with high directivity but relatively low aperture efficiency when its aperture size is electrically large. A novel FPRA is proposed,both of whose superstrate and ground are designed to be non-uniform metamaterial, so as to realize the equal amplitude and cophasal distributions respectively for its aperture electromagnetic field, and thus enhance its aperture efficiency when its aperture size is electrically large. Based on the ray-tracing method, a set of formula for designing the non-uniform superstrate and ground are deduced. As a sample, a cylindrical FPRA with an aperture diameter of 5.18λ(λis the free space wavelength) is designed, fabricated and measured. Measured results agree well with simulated ones. It possesses an impedance bandwidth of 4.14%(5.740-5.980 GHz) when |S11|<-10 dB. At working frequency of 5.8 GHz,its directivity is 23.8 dBi. In comparison with a conventional FPRA with uniform superstrate and ground,the proposed FPRA increases the aperture efficiency from 78.9% to 90.5%.

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文 鸿,陈 星.基于非均匀设计的高口径效率Fabry-Perot谐振腔天线[J]. Journal of Terahertz Science and Electronic Information Technology ,2018,16(1):115~118

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History
  • Received:October 28,2017
  • Revised:November 08,2017
  • Adopted:
  • Online: March 06,2018
  • Published: