Open AccessCoplanar waveguide‐fed rose‐curve shape UWB monopole antenna with dual‐notch characteristics
Author(s) -
Abu Safia Ousama,
Nedil Mourad,
Talbi Larbi,
Hettak Khelifa
Publication year - 2018
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.2017.0852
Subject(s) - antenna (radio) , monopole antenna , radiation pattern , physics , split ring resonator , circumference , notching , optics , coplanar waveguide , acoustics , resonator , computer science , engineering , telecommunications , mathematics , geometry , microwave , mechanical engineering
In this study, a new design of a planar ultra‐wideband (UWB) monopole antenna with a rose‐curve contour shape is proposed. The rose‐curve circumference of the monopole is expressed in polar coordinates as: r = r 0 + a cos n θ . This function enables a flexible and easy to control layout, which directly affects the antenna's response. The arguments of the function are specified based on a simple deterministic design rule and the outputs of a parametric study. The antenna covers the 3.1–11 GHz band and has an ultra‐miniaturised size of 864 mm 3 when realised on a RT/Duroid 6010LM substrate of 0.635 mm thickness. To add dual‐notch characteristics to the proposed antenna, a complementary dual‐band split ring resonator inclusion is etched on the antenna's patch near the feeding line. The inclusion is designed to operate at the two Wi‐Fi and ISM frequency bands, 3.5 and 5.8 GHz, respectively. These centre band frequencies are determined using a new hybrid method that utilises the resonant and non‐resonant design approaches of metamaterial structures. Simulated and measured return loss values, radiation patterns and gain values for the proposed antennas (with and without notching) are in very good agreements, and demonstrate satisfactory performance.