Open AccessWide‐b‐and circularly polarised slot antenna by using artificial transmission line
Author(s) -
Ghaffarian Mohammad Saeid,
Moradi Gholamreza,
Mousavi Pedram
Publication year - 2017
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.2016.0784
Subject(s) - transmission line , antenna (radio) , physics , optics , slot antenna , transmission (telecommunications) , turnstile antenna , coaxial antenna , telecommunications , computer science , antenna measurement , radiation pattern
A novel single‐feed wide band planar single layer circularly polarised (CP) slot antenna is presented. This low cost slot antenna consists of an L‐shaped feeding stub with metamaterial inspired complementary split ring resonator (MICSRR) and a wide 45° rotated symmetric square aperture. Broadband impedance and CP radiation bandwidth (BW) is achieved by using a novel artificial exciting stub with defecting CSRRs on it. By controlling the excitation phase of L‐shaped stub, a desirable circular polarisation can be generated and both impedance and CP BWs are considerably increased by up to 89%. The operating frequency ranges in S/C band about 1.5 octaves from 2.4–6.22GHz that covers most of the commercial wireless communication systems, such as WLAN (IEEE 802.11 (2.4/3.6/4.9/5/5.9GHz)), LTE and WiMAX (2.5/3.5/5.8GHz). The measured BWs of 3‐dB axial ratio and voltage standing wave ratio < 2 are around 91% (2.4–6.4GHz) and 89% (2.4–6.22GHz), respectively. The measured boresight gain is less than 6 dBic over the CP BW.