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Planar endfire circularly polarized antenna using concentric annular sector complementary dipoles
Author(s) -
Xue Bai,
You Man,
Lu WenJun,
Zhu Lei
Publication year - 2016
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21035
Subject(s) - optics , concentric , physics , axial ratio , dipole , planar , dipole antenna , wavelength , radiation pattern , bandwidth (computing) , antenna (radio) , geometry , circular polarization , microstrip , mathematics , telecommunications , engineering , computer graphics (images) , quantum mechanics , computer science
A novel planar endfire circularly polarized (CP) antenna is presented and explored by using concentric annular sector complementary dipoles. The antenna is composed of a semicircular disk radiator operating at TM 11 mode and a concentric annular sector dipole operating at one‐half wavelength mode. A set of closed‐form formulas is derived to reveal the operation principle and employed to determine the geometrical parameters of the proposed CP antenna. The design approach is both numerically and experimentally validated. Good agreement between the theoretical, numerical and experimental results has demonstrated its endfire radiation beam in parallel with its plane. The fractional impedance bandwidth for |S 11 | < −10 dB is up to 6.45%, and axial ratio (AR) bandwidth of less than 3 dB is up to 14.43% in fraction, in addition to its simple geometry with only seven design parameters.