Open AccessGain enhancement of a compact thin flexible reflector‐based asymmetric meander line antenna with low SAR
Author(s) -
El Atrash Mohamed,
Abdalla Mahmoud A.,
Elhennawy Hadia M.
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5397
Subject(s) - radiation pattern , optics , monopole antenna , antenna (radio) , reflector (photography) , specific absorption rate , return loss , dipole antenna , bent molecular geometry , acoustics , materials science , physics , engineering , electrical engineering , light source , composite material
A compact, flexible, coplanar waveguide‐fed, U‐shaped reflector surrounded asymmetric meander line antenna operating at 2.4 GHz is presented for wrist wearable applications. The antenna is printed on flexible Rogers Ultralam 3850 substrate. Size reduction of 67.7% was attained by employing the meandering methodology, in comparison with the printed straight monopole. The design displays a gain of around 3 dB by incorporating a U‐shaped reflector, on the same level as the radiator, which is considered as the main contribution of the proposed design. Bending scenarios were studied proving the antenna robustness against bending. The proposed antenna was bent over a human body model with optimum separation distance, where enhancement of the specific absorption rate (SAR) level has been achieved, compared to the symmetric meander line antenna. The antenna was fabricated and measured where a high agreement was met in terms of simulated and measured return loss and radiation pattern polar plots, as well as, simulated and measured gain.