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A broadband circularly polarized monopole antenna employing parasitic loops and defective ground plane
Author(s) -
Feng Guirong,
Chen Lei,
Shi Xiaowei
Publication year - 2020
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.31998
Subject(s) - ground plane , monopole antenna , broadband , physics , optics , bandwidth (computing) , magnetic monopole , radiation pattern , helical antenna , circular polarization , antenna (radio) , electrical engineering , engineering , telecommunications , microstrip , periscope antenna , quantum mechanics
A simple printed monopole antenna using parasitic loops and defective ground plane is presented for broadband circular polarized (CP) radiation. For this purpose, two square open loops, which install air gaps at the corner and close to the monopole, are printed on both sides for achieving broadband CP radiation with three minimum axial ratio (AR) points. By using a defective ground plane with a vertical slot and a horizontal slot, additional AR points can be excited to further broaden the AR bandwidth. This design was fabricated, and the measured results show that the antenna with a simple structure achieves both wide impedance bandwidth of 87.2% (2.62‐6.67 GHz) and AR bandwidth of 83.9% (2.6‐6.36 GHz).