一种具有多频段和宽带特性的共形频率可重构天线。

A Conformal Frequency Reconfigurable Antenna with Multiband and Wideband Characteristics.

作者信息

Hussain Niamat, Ghaffar Adnan, Naqvi Syeda Iffat, Iftikhar Adnan, Anagnostou Dimitris E, Tran Huy H

机构信息

Department of Smart Device Engineering, School of Intelligent Mechatronics Engineering, Sejong University, Seoul 05006, Korea.

Department of Electrical and Electronics Engineering, Auckland University of Technology, Auckland 1010, New Zealand.

出版信息

Sensors (Basel). 2022 Mar 29;22(7):2601. doi: 10.3390/s22072601.

DOI:10.3390/s22072601

PMID:35408216

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9003087/

Abstract

A compact flexible multi-frequency antenna for smart portable and flexible devices is presented. The antenna consists of a coplanar waveguide-fed slotted circular patch connected to a rectangular secondary resonator (stub). A thin low-loss substrate is used for flexibility, and a rectangular stub in the feedline is deployed to attain wide operational bandwidth. A rectangular slot is etched in the middle of the circular patch, and a diode is placed at its center. The frequency reconfigurability is achieved through switching the diode that distributes the current by changing the antenna's electrical length. For the ON state, the antenna operates in the UWB region for -10 dB impedance bandwidth from 2.76 to 8.21 GHz. For the OFF state of the diode, the antenna operates at the ISM band (2.45/5.8 GHz), WLAN band (5.2 GHz), and lower X-band (8 GHz) with a minimum gain of 2.49 dBi and a maximum gain of 5.8 dBi at the 8 GHz band. Moreover, the antenna retains its performance in various bending conditions. The proposed antenna is suitable for modern miniaturized wireless electronic devices such as wearables, health monitoring sensors, mobile Internet devices, and laptops that operate at multiple frequency bands.

摘要

本文提出了一种适用于智能便携式和柔性设备的紧凑型柔性多频天线。该天线由一个共面波导馈电的开槽圆形贴片和一个连接到矩形次级谐振器（短截线）组成。使用薄的低损耗基板以实现柔性，并在馈线中部署一个矩形短截线以获得宽工作带宽。在圆形贴片的中间蚀刻一个矩形槽，并在其中心放置一个二极管。通过切换二极管来改变天线的电长度从而分配电流，实现频率可重构性。对于导通状态，天线在超宽带区域工作，-10 dB阻抗带宽为2.76至8.21 GHz。对于二极管的截止状态，天线在ISM频段（2.45/5.8 GHz）、WLAN频段（5.2 GHz）和较低的X频段（8 GHz）工作，在8 GHz频段最小增益为2.49 dBi，最大增益为5.8 dBi。此外，该天线在各种弯曲条件下都能保持其性能。所提出的天线适用于现代小型化无线电子设备，如可穿戴设备、健康监测传感器、移动互联网设备和在多个频段工作的笔记本电脑。