Dual‐band asymmetric circular polariser based on fission transmission of linearly polarised wave. Issue 8 (16th May 2018)

• Record Type: Journal Article
• Authors: Mangi, Farman Ali; Xiao, Shaoqiu; Yao, Zhixin; Memon, Imran; Kakepoto, Ghulam Fatima
• Is Part Of: IET microwaves, antennas & propagation. Volume 12:Issue 8(2018)
• Page Start: 1414
• Page End: 1419
• Publication Date: 2018-05-16
• Subjects: multifrequency antennas -- electromagnetic wave polarisation -- antenna radiation patterns -- circular dichroism -- current distribution -- metamaterial antennas -- microwave metamaterials -- microwave antennas; dual‐band asymmetric circular polariser -- fission transmission of linearly polarised wave -- FTLP wave -- circular dichroism effect -- x‐linearly polarised incident wave -- four linear transmission components -- orthogonal component transmission sequence -- orthogonal component incidence sequence -- asymmetric transmission wave emission -- surface current distribution -- right‐handed circularly polarised wave -- left‐handed circularly polarised wave -- axial ratio bandwidth -- frequency 14.40 GHz to 15.70 GHz -- frequency 16.0 GHz to 17.0 GHz; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2017.0590
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A dual‐band asymmetric circular polariser based on fission transmission of linearly polarised (FTLP) wave is presented. First, the novel approach of FTLP wave is introduced to transform linearly polarised wave into the circularly polarised wave with strong circular dichroism effect. It means that the x ‐linearly polarised incident wave converts into two orthogonal components E x t and E y t through the bottom layer of the structure along the + z direction. The two decomposed components are used as excitation source for the upper layer and converted into four linear transmission components at the end of the structure. The phenomena of incidence and transmission sequence of the orthogonal components constitute the chain transmission of the linearly polarised wave. The designed structure achieves dual‐band circular polarisation with asymmetric transmission wave emission by the principle of FTLP wave. The transformation behaviour for circular polarisation is illustrated by the surface currents distribution. The proposed structure achieves a right‐handed circularly polarised wave and left‐handed circularly polarised wave with high transmission at 14.40–15.70 GHz and at 16.0–17.0 GHz, respectively. The axial ratio bandwidth of 11.76 and 6.86% is obtained at dual band. The simulated and measured results exhibit good correspondence.