基于准辐射器的用于ISM应用的方向图可重构圆极化单向天线设计

Design of pattern-reconfigurable circularly polarized unidirectional antenna based on quasi-radiator for ISM applications.

作者信息

Arthur Philip, Ellis Mubarak Sani, Ahmed Abdul-Rahman, Kponyo Jerry John

机构信息

Department of Telecommunication Engineering, Kwame Nkrumah University of Science and Technology, Kumasi-Ghana.

出版信息

Heliyon. 2022 Nov 18;8(11):e11721. doi: 10.1016/j.heliyon.2022.e11721. eCollection 2022 Nov.

DOI:10.1016/j.heliyon.2022.e11721

PMID:36439733

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9681643/

Abstract

A pattern-reconfigurable circularly polarized antenna for 2.45 GHz industrial, scientific, and medical (ISM) band applications is designed in this work. The proposed antenna consists of a slotted-stepped monopole connected to a rectangular ground plane via a shorting side-stub. This converts the omnidirectional radiation pattern of the antenna into stable unidirectional radiation. To dynamically steer the realized pattern, two switchable RF PIN diodes are jointly incorporated into the side-stubs to achieve symmetrical radiations in specific operating modes. In this way, the radiation patterns can be simultaneously tuned in the directions by the simple switching of the PIN diodes ON and OFF. The fabricated prototype achieves an smaller than -10dB within the 3dB axial ratio (AR) bandwidth with stable far-field patterns. The antenna maintains a low-profile and compact size of which makes it suitable for body-centric wireless communication (BWC) and personal wireless area networks.

摘要

本文设计了一种用于2.45GHz工业、科学和医疗（ISM）频段应用的模式可重构圆极化天线。所提出的天线由一个通过短路侧边短截线连接到矩形接地平面的开槽阶梯单极子组成。这将天线的全向辐射方向图转换为稳定的单向辐射。为了动态控制实现的方向图，两个可切换的射频PIN二极管被共同集成到侧边短截线中，以在特定工作模式下实现对称辐射。通过这种方式，通过简单地开关PIN二极管的导通和关断，可以在方向上同时调整辐射方向图。所制作的原型在3dB轴比（AR）带宽内实现了小于-10dB的，具有稳定的远场方向图。该天线保持低剖面和紧凑的尺寸，使其适用于以身体为中心的无线通信（BWC）和个人无线局域网。