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A planar end‐fire circularly polarized complementary Yagi antenna
Author(s) -
Dong Gaoya,
Wang Weimin,
Liu Yuanan
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.31819
Subject(s) - turnstile antenna , bandwidth (computing) , circular polarization , axial ratio , optics , physics , planar , impedance matching , electrical impedance , dipole antenna , antenna (radio) , antenna factor , electrical engineering , engineering , telecommunications , computer science , microstrip , computer graphics (images) , quantum mechanics
Abstract A novel end‐fire circularly polarized (CP) antenna is presented by integrating a vertically polarized magnetic Yagi array, a horizontally polarized electric Yagi array, various lengths of the directors and common driven elements. Slots with nine Jesus crosses are etched on the common driven elements to extend the impedance matching bandwidth of magnetic Yagi array, while various length of directors are employed to obtain wide axial ratio (AR) bandwidth. The designed CP antenna is both numerically and experimentally validated, and experimental results agree well with electromagnetic simulated results. The fractional impedance bandwidth for ∣ S 11 ∣ < 10 dB is up to 20.7%, and AR bandwidth of less than 3 dB is up to 16.0% in fraction.