A circularly polarised multiple input multiple output antenna with single-sense for sub-6 GHz 5G applications

IF 1.1 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Microwaves Antennas & Propagation Pub Date : 2023-10-13 DOI:10.1049/mia2.12426

Zin Mar Phyo, Takafumi Fujimoto, Chai-Eu Gaun

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Abstract

In this study, a compact wideband circularly polarised Multiple Input Multiple Output (MIMO) antenna with the two parasitic elements is proposed. The printed monopole antenna for wideband circular polarisation proposed in authors' previous study is used as an antenna element. One-sided substrate reflector is installed at the back side of the antenna, positioned 0.2λ₀ away, to improve the gain. The circularly polarised radiation, deteriorated by the influence of mutual coupling of two antenna elements and reflector, is improved by deploying two parasitic elements on the bottom layer of the antenna's substrate. The antenna's size is 0.99λ₀ × 0.32λ₀ and the reflector's size is 1.41λ₀ × 0.82λ₀ (λ₀ is the free-space wavelength at lowest operating frequency). The measured bandwidth of 10 dB impedance with a 3 dB axial ratio is 33.49% from 3.53 to 4.95 GHz, which can be utilised for sub-6 GHz 5G applications. The simulated and experimental results are compared to validate the antenna characteristics.

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一种圆极化多输入多输出天线，单感测，适用于6 GHz以下的5G应用

在这项研究中，提出了一个紧凑的宽带圆极化多输入多输出(MIMO)天线与两个寄生元件。采用作者先前研究中提出的宽带圆极化印刷单极天线作为天线单元。为了提高增益，在天线背面安装了单面基板反射器，其位置为0.2λ0。由于两个天线元件和反射器相互耦合的影响而恶化的圆极化辐射，通过在天线基板的底层部署两个寄生元件来改善。天线尺寸为0.99λ0 × 0.32λ0，反射面尺寸为1.41λ0 × 0.82λ0 (λ0为最低工作频率下的自由空间波长)。在3.53至4.95 GHz范围内，具有3db轴比的10db阻抗的测量带宽为33.49%，可用于低于6 GHz的5G应用。仿真结果与实验结果进行了比较，验证了天线的特性。

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来源期刊

Iet Microwaves Antennas & Propagation 工程技术-电信学

CiteScore

4.30

自引率

5.90%

发文量

109

审稿时长

7 months

期刊介绍： Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf