Open AccessCompact, wideband‐printed quasi‐Yagi antenna using spiral metamaterial resonators
Author(s) -
Aeini M.,
Jarchi S.,
FarajiDana R.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2017.2149
Subject(s) - microstrip antenna , materials science , antenna measurement , antenna factor , coaxial antenna , patch antenna , metamaterial antenna , antenna efficiency , radiation pattern , optoelectronics , optics , acoustics , antenna (radio) , physics , telecommunications , computer science
A novel structure for size reduction and bandwidth enhancement of quasi‐Yagi antenna using spiral resonator (SR) metamaterials is presented. The basic resonance is produced through excitation of simple quasi‐Yagi antenna elements through a microstrip feedline while parasitic SR metamaterials augment bandwidth. The antenna is designed on an glass‐reinforced epoxy laminate sheets (FR4) substrate with a dielectric constant of 4.4 and a thickness of 1.6 mm. Compared to original printed quasi‐Yagi antennas, the size of the proposed quasi‐Yagi antenna is reduced by ∼53%. Simulation results show that the proposed antenna has the impedance characteristics with a frequency bandwidth of 1.43–3.97 GHz (94%) for return loss more than 10 dB and a gain of 3.4–5.2 dBi in the corresponding frequency range. The designed antenna presents an end‐fire radiation with a front‐to‐back ratio >10 dB. The antenna is fabricated, and measurement results demonstrate compactness and wide bandwidth of the antenna.