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Simple circularly polarized planar monopole inverted T‐shaped antenna
Author(s) -
Ellis Mubarak S.,
Ahmed Abdul Rahman,
Kponyo Jerry John,
Nourinia Javad,
Ghobadi Changiz,
Mohammadi Bahman
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.32026
Subject(s) - monopole antenna , physics , optics , radiation pattern , planar , ground plane , bandwidth (computing) , j pole antenna , helical antenna , circular polarization , coaxial antenna , antenna (radio) , telecommunications , engineering , computer science , microstrip , computer graphics (images)
This article presents a novel planar monopole antenna with circular polarization. The 3‐dB axial ratio (AR) is achieved by: shifting a vertical monopole to the left edge of the substrate in conjunction with a laterally inverted L‐shaped ground plane. When viewed from the top, the antenna resembles an uneven T‐shaped structure rotated at 90°. Measurement results show that; a 3‐dB AR bandwidth is achieved from 3.1 to 6.2 GHz (66.7% fractional bandwidth) and an S 11 ≤ −10 dB bandwidth is realized from 2.5 to 6.5 GHz (88.9% fractional bandwidth). The proposed antenna is compact with an area of 20 mm 2 , produces stable radiation patterns, and its simple to design and fabricate without using parasitic elements or introducing slots on the antenna.