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Triple‐band planar dipole antenna for omnidirectional radiation
Author(s) -
Alibakhshikenari Mohammad,
Virdee Bal S.,
Limiti Ernesto
Publication year - 2018
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.31098
Subject(s) - optics , physics , radiation pattern , ground plane , dipole antenna , omnidirectional antenna , monopole antenna , j pole antenna , planar , stub (electronics) , antenna (radio) , impedance matching , electrical impedance , coaxial antenna , electrical engineering , engineering , computer science , computer graphics (images) , quantum mechanics
This letter presents a compact triple‐band dipole antenna that radiates omnidirectionally. The antenna is a T‐shaped structure that is excited through a vertical feedline. Located under the horizontal rectangular patch are two λ/2 long meander‐line stubs symmetrically interfaced to the feedline. On the bottom side of the substrate is a trident shaped ground‐plane structure located under the T‐shaped radiator. The proposed configuration is essentially composed of three radiating elements, which has a small footprint of 19 × 16 mm 2 on a 0.8 mm thick substrate. Regions of enhanced impedance matching are realized between 0.5 and 2.69 GHz, 3.2–4.44 GHz and 4.82–6.6 GHz covering major portions of L, S, and C‐bands. It is shown by reducing the gap between the meander lines stub and rectangular patch reduces results in increased gain performance. Measured results confirm the antenna exhibits omnidirectional radiation with enhanced impedance match at 1.5, 4, and 5.4 GHz with corresponding average gain of 1.6 dBi, 3.4 dBi, and 3 dBi, respectively.