Aperture efficiency improvement using metasurface

H. L. Zhu, S. W. Cheung, Y. Jay Guo, Can Ding, T. I. Yuk

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

4 Citations (Scopus)


A method to improve the aperture efficiency of antennas using a non-uniform metasurface (MS) is studied in this paper. For illustration, a patch antenna and a planar MS having unit cells of square patches with different sizes are used. The sizes of the square patches on the MS follow a radial gradient index function. The aperture efficiencies of the patch antenna and the antenna using the MS are compared. For easy comparison, the patch antenna is designed to have an aperture size of λ0×λ0, where the λis wavelength at the operating frequency in free space. Simulation results show that, by placing the MS atop the patch antenna with a separating distance of 35 mm, the directivity of the patch antenna can be increased from 9.7 dBi to 11.6 dBi. With the aperture size remains unchanged, the aperture efficiency of the patch antenna is increased by more than 100%.

Original languageEnglish
Title of host publicationEuCAP 2016
Subtitle of host publication10th European Conference on Antennas and Propagation : proceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9788890701863
Publication statusPublished - 2016
Externally publishedYes
EventEuropean Conference on Antennas and Propagation (EuCAP) (10th : 2016) - Davos, Switzerland
Duration: 10 Apr 201615 Apr 2016
Conference number: 10th


OtherEuropean Conference on Antennas and Propagation (EuCAP) (10th : 2016)
Abbreviated titleEuCAP 2016


  • patch antenna
  • aperture efficiency
  • metasurface
  • radial gradient index function


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