A Dual-Band Circularly Polarized Antenna With Shared Aperture for Satellite-Assisted Internet of Things Communications

IF 8.9 1区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS IEEE Internet of Things Journal Pub Date : 2024-11-18 DOI:10.1109/JIOT.2024.3500365

Zhichao Sun;Xiaojing Lv;Xuyi Zhu;Zhenxi Liang;Yang Yang

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Abstract

A low-profile and dual-wideband circularly polarized (CP) shared aperture antenna is demonstrated for satellite-assisted Internet of Things (SATA-IoT) communications. It comprises an X-band antenna and a

$4\times 4$

Ka-band antenna array, both magnetoelectric (ME) dipole structures with complementary structures, and only have

$0.08{\lambda }_{\mathrm { low}}$

thickness. Four mesh-structure dipole arms are utilized for the X-band antenna to integrate the X/Ka band antenna into the limited aperture while maintaining good isolation. Meanwhile, stubs and a sequential rotation feeding (SRF) network are adopted to improve the axial ratio (AR) performance of the two antennas, respectively. The measured results indicate that the antenna achieves an overlapped bandwidth (

$|S_{11}|\lt -10$

dB, AR ¡ 3) of 10.8% (8.7–9.7 GHz) and 29.32% (25.73–34.57 GHz), with isolations greater than 20 dB in both bands. The measured peak realized gains are 8.9 and 15 dBi, respectively. The proposed antenna realized exceptional low-profile and dual-wideband CP performance, making it a promising candidate for SATA-IoT communications.

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用于卫星辅助物联网通信的共享孔径双频圆极化天线

展示了一种用于卫星辅助物联网（SATA-IoT）通信的低轮廓双宽带圆极化（CP）共享孔径天线。它包括一个x波段天线和一个$4\ × 4$ ka波段天线阵列，两者都是具有互补结构的磁电（ME）偶极子结构，厚度仅为$0.08{\lambda}_{\ maththrm {low}}$。X波段天线采用四个网格结构偶极子臂，在保持良好隔离的同时将X/Ka波段天线整合到有限孔径中。同时，采用存根和顺序旋转馈电（SRF）网络分别提高了两根天线的轴向比（AR）性能。测量结果表明，该天线实现了10.8% （8.7 ~ 9.7 GHz）和29.32% （25.73 ~ 34.57 GHz）的重叠带宽（$|S_{11}|\lt -10$ dB, AR±3），两个频段的隔离度均大于20 dB。测量到的峰值实现增益分别为8.9和15 dBi。该天线实现了卓越的低轮廓和双宽带CP性能，使其成为SATA-IoT通信的有希望的候选者。

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来源期刊

IEEE Internet of Things Journal Computer Science-Information Systems

CiteScore

17.60

自引率

13.20%

发文量

1982

期刊介绍： The EEE Internet of Things (IoT) Journal publishes articles and review articles covering various aspects of IoT, including IoT system architecture, IoT enabling technologies, IoT communication and networking protocols such as network coding, and IoT services and applications. Topics encompass IoT's impacts on sensor technologies, big data management, and future internet design for applications like smart cities and smart homes. Fields of interest include IoT architecture such as things-centric, data-centric, service-oriented IoT architecture; IoT enabling technologies and systematic integration such as sensor technologies, big sensor data management, and future Internet design for IoT; IoT services, applications, and test-beds such as IoT service middleware, IoT application programming interface (API), IoT application design, and IoT trials/experiments; IoT standardization activities and technology development in different standard development organizations (SDO) such as IEEE, IETF, ITU, 3GPP, ETSI, etc.