J4 ›› 2014, Vol. 41 ›› Issue (6): 71-75.doi: 10.3969/j.issn.1001-2400.2014.06.012

• 研究论文 • 上一篇    下一篇

一种可用于RFID系统中的方向回溯阵列设计

陈蕾;史小卫;余剑峰;陈阳   

  1. (西安电子科技大学 天线与微波技术重点实验室,陕西 西安  710071)
  • 收稿日期:2013-08-21 出版日期:2014-12-20 发布日期:2015-01-19
  • 通讯作者: 陈蕾
  • 作者简介:陈蕾(1982-),女,讲师,E-mail: leichen@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(61072021);中央高校基本科研业务费专项资金资助项目(SPSZ021408, K50511020001)

Design of a retrodirective array for RFID application

CHEN Lei;SHI Xiaowei;YU Jianfeng;CHEN Yang   

  1.  (Science and Technology on Antenna and Microwave Lab., Xidian Univ., Xi'an  710071, China)
  • Received:2013-08-21 Online:2014-12-20 Published:2015-01-19
  • Contact: CHEN Lei

摘要:

通过射频混频技术实现单元相位共轭的方式,设计了一个C波段方向回溯阵列,采用收发共用天线单元减小阵列体积.混频模块基于输入/输出共用端口的场效应晶体管混频器完成相位共轭,引入定向耦合器用于提高收发端口的隔离度并抑制射频泄露信号,该阵列具有成本低、体积小、隔离度高、作用距离远等优点.制作了四元方向回溯阵列,在发射信号频率为5.81GHz、本振信号频率为11.6GHz时,进行了测试,结果表明,该阵列在±33°入射角度范围内具有良好的方向回溯功能,可应用于射频识别系统中.

关键词: 方向回溯阵列, 场效应晶体管混频器, 高隔离度, 射频识别

Abstract:

A C-band retrodirective array is presented. A single antenna is designed for both receiving and retransmitting where the isolation is provided by the hybrid coupler. The heterodyne technique is used for the phase-conjugation process which is achieved by a passive field effect transistor(FET) mixer with a shared input/output port. The proposed array has the characteristics of low cost, compact size, high isolation and long working distance. A four-element prototype is demonstrated with an interrogating frequency of 5.81GHz and a local oscillator frequency of 11.6GHz. Measured results verify that the system has good retrodirectivity over an incident range of ±33° which is suitable for radio frequency identification(RFID) application.

Key words: retrodirective array, field effect transistor(FET) mixer, high isolation, radio frequency identification(RFID)