用于超高频射频识别的小型宽带高定向天线

doi:10.3969/j.issn.1001-506X.2020.05.03

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (5): 987-991.doi: 10.3969/j.issn.1001-506X.2020.05.03

用于超高频射频识别的小型宽带高定向天线

傅世强(), 熊昂宇(), 陈韦宁(), 房少军()

大连海事大学信息科学技术学院, 辽宁大连 116026

收稿日期:2019-09-23 出版日期:2020-04-30 发布日期:2020-04-30
作者简介:傅世强 (1981-),男,副教授,博士,主要研究方向为海事卫星通信和卫星定位导航雷达终端天线理论与设计、微波电路和射频识别技术。E-mail:fushq@dlmu.edu.cn|熊昂宇 (1996-),男,硕士研究生,主要研究方向为微波电路与天线设计。E-mail:1845145595@qq.com|陈韦宁 (1978-),男,工程师,博士,主要研究方向为射频识别技术与应用。E-mail:1650884133@qq.com|房少军 (1957-),男,教授,博士,主要研究方向为电磁场理论、射频微波与天线。E-mail:fangshj@dlmu.edu.cn
基金资助:
国家自然科学基金(61571075)

Small broadband high directional antenna for UHF RFID

Shiqiang FU(), Angyu XIONG(), Weining CHEN(), Shaojun FANG()

College of Information Science and Technology, Dalian Maritime University, Dalian 116026, China

Received:2019-09-23 Online:2020-04-30 Published:2020-04-30
Supported by:
国家自然科学基金(61571075)

摘要/Abstract

摘要：

基于Moxon天线具有高前后比和小型化的优点,并结合蝶形偶极子天线宽带的工作特性,设计了一款用于超高频(ultra-high frequency, UHF)射频识别(radio frequency identification, RFID)手持读写器的小型宽带高定向平面印刷天线。该天线采用Moxon和蝶形偶极子复合结构,利用平行双线馈电,引入微带渐变巴伦实现馈电平衡。最终天线尺寸为0.34λ₀×0.22λ₀(λ₀为中心频率工作波长),相比微带准八木天线实现了小型化。实测结果表明:在865~1 054 MHz频率范围内,天线的|S₁₁|＜-10 dB,增益均在3.5 dB以上,相对工作带宽达到20%;并且在UHF开放频段902~928 MHz频率范围内,天线的驻波比(voltage standing wave ratio, VSWR)小于1.4,前后比大于15 dB,增益高于5 dB。

关键词: 小型化, 宽频带, 高前后比, 平面印刷天线

Abstract:

Based on the advantages of high front-to-back ratio and miniaturization of Moxon antenna, and combined with the broadband characteristics of bowtie dipole antenna, a compact broadband high directional planar printed antenna for ultra-high frequency (UHF) radio frequency identification (RFID) handheld reader is designed. The antenna adopts the composite structure of Moxon and bowtie dipole, uses the double-sided parallel-strip line feed, and introduces the microstrip tapered balun to achieve the feed balance. The ultimate antenna size is 0.34λ₀×0.22λ₀ (λ₀ is the wavelength of the central frequency), making it smaller than the microstrip quasi-yagi antenna. The measured results show that the reflection coefficient of the antenna in the 865~1 054 MHz frequency band is less than -10 dB, the gain is more than 3.5 dB, and the relative operating bandwidth reaches 20%. In addition, in the UHF unlicensed band of 902~928 MHz, the voltage standing wave ratio (VSWR) of the antenna is less than 1.4, the front-to-back ratio is greater than 15 dB, and the gain is higher than 5 dB.

Key words: miniaturization, broadband, high front-to-back ratio, planar printed antenna

中图分类号:

TN821.4

傅世强, 熊昂宇, 陈韦宁, 房少军. 用于超高频射频识别的小型宽带高定向天线[J]. 系统工程与电子技术, 2020, 42(5): 987-991.

Shiqiang FU, Angyu XIONG, Weining CHEN, Shaojun FANG. Small broadband high directional antenna for UHF RFID[J]. Systems Engineering and Electronics, 2020, 42(5): 987-991.

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用于超高频射频识别的小型宽带高定向天线

Small broadband high directional antenna for UHF RFID

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