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Improvement of the gain and the axial ratio of a circular polarization microstrip antenna by using a metamaterial superstrate
Author(s) -
Safari Dehnavi Mahboubeh,
Razavi Seyyed Mohammad Javad,
Mohseni Armaki Seyyed Hossien
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31886
Subject(s) - microstrip antenna , return loss , optics , metamaterial antenna , axial ratio , radiation pattern , antenna gain , antenna measurement , patch antenna , metamaterial , coaxial antenna , antenna factor , materials science , antenna (radio) , circular polarization , physics , microstrip , engineering , electrical engineering
In this article, a new design of circular polarized (CP) microstrip antenna for 2.2 GHz band applications is introduced. This compact design has achieved return loss and axial ratio lower than −10 and 3 dB, respectively. Next, a polarized insensitive metamaterial surface acting as a superstrate is proposed for improvement of the antenna characteristics. By putting the suggested double stacked meta‐surface layer over a CP microstrip antenna, the radiation pattern of antenna has been improved significantly. As a result, the antenna gain is enhanced about 4.7 dBi and simultaneously the overlap of return loss band and axial ratio band is increased about 3%. The structure is simulated in CST MICROWAVE STUDIO software and the results show reasonable conformity with the measurements.