被動式UHF RFID電子標籤設計與RCS分析

Tags design and RCS analysis for passive UHF RFID

張正弘(Cheng-Hung Chang)

指導教授 ： 許恆通

元智大學/電機通訊學院/通訊工程學系/碩士(2008年)

摘要

本論文主要研究重點為被動式無線射頻辨識系統電子標籤設計、製作和測試。採用德州儀器公司所生產的RI-UHF-STRAP-08標籤晶片，相較於其他標籤晶片，有著較小功率消耗。在電子標籤所採用的操作頻率下，使用TRL校正量測法，量測標籤晶片阻抗的特性。標籤天線和晶片的使用頻率之間必需為複數阻抗匹配，因此，採用Quasi Log-periodic antenna為主要標籤天線架構。輻射功率為EIRP=4W時，量測得到最大讀取距離為4.5公尺。

關鍵字

無線射頻辨識系統 ； 電子標籤 ； 標籤天線 ； 雷達截面積

並列摘要

This thesis is devoted to the design, fabrication and testing of tags for passive UHF radio-frequency identification (RFID) system. RI-UHF-STRAP-08 form TI is identified at the chip IC strap for the tag due to its relative low DC power consumption. While the chip impedance of the tag IC was characterized through TRL calibrated measurement system, complex conjugate matching technique at desired frequency was adopted. In order to achieve good power match, across the entire frequency band of operation, quasi log-periodic antenna scheme was implemented
. The tested maximum readable was measured to be 4.5m at EIRP=4W output level.

並列關鍵字

RFID ； Tag ； Tag antenna ； RCS

參考文獻

[1] Jong-Wook Lee, Hongil Kwon, and Bomson Lee, “Design Consideration of UHF RFID Tag for Increased Reading Range,” IEEE MTT-S International Microwave Symposium, 2006, pp. 1588-1591.

[4] K. V. Seshagiri Rao, Pavel V. Nikitin and Sander F. Lam, “Antenna Design for UHF RFID Tags: A Review and a Practical Application,” IEEE Transactions on Antennas and Propagation, volume 53, no. 12, December 2005, pp. 3870-3876.

[6] Robert K. Schneider, “A Re-look at Antenna In-band RCSR via Load Mismatching,” IEEE Antennas and Propagation Society International Symposium, volume 2, 21-26 July 1996, pp. 1398–1401.

[7] Pavel V. Nikitin and K. V. Seshagiri Rao, “Theory and measurement of backscattering from RFID tags,” IEEE Antennas and Propagation Magazine, volume 48, no. 6, December 2006, pp. 212-218.

[8] E. Kennaugh, “Polarization dependence of RCS-A geometrical interpretation,” IEEE Transactions on Antennas and Propagation, volume 29, no. 2, March 1981, pp. 412-413.