一种可用于RFID系统中的方向回溯阵列设计

doi:10.3969/j.issn.1001-2400.2014.06.012

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

• Original Articles • Previous Articles Next Articles

Design of a retrodirective array for RFID application

CHEN Lei;SHI Xiaowei;YU Jianfeng;CHEN Yang

(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 E-mail:leichen@mail.xidian.edu.cn

Abstract

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)

CHEN Lei;SHI Xiaowei;YU Jianfeng;CHEN Yang. Design of a retrodirective array for RFID application[J].J4, 2014, 41(6): 71-75.

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Design of a retrodirective array for RFID application

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