Dissertation/ Thesis
UHF Passive Tag Design for Multi-Carrier RFID Systems
| العنوان: | UHF Passive Tag Design for Multi-Carrier RFID Systems |
|---|---|
| Alternate Title: | 多載波超高頻無線射頻辨識系統之被動式標籤設計 |
| المؤلفون: | Ming-Hsien Li, 李明憲 |
| Thesis Advisors: | Chia-Yu Yao, Hsin-Chin Liu, 姚嘉瑜, 劉馨勤 |
| سنة النشر: | 2012 |
| المجموعة: | National Digital Library of Theses and Dissertations in Taiwan |
| الوصف: | 101 Passive RFID system is the most popular system be used all over the world. In this system, a passive RFID tag gains its power from reader emitting electromagnetic wave, and backscatter its responding signal to the reader. However, Because of the large propagation loss, the accessible range of a passive RFID tag is hence limited. In order to mitigate the problems, a multi-carrier UHF passive RFID system utilizes isolated continuous wave emitters to provide additional power to passive RFID tags. This approach however reduces the modulation depth of reader command signals and results in reader signal demodulation error in a passive RFID tag. This work proposes a new passive RFID tag demodulation circuit which can extend the tag read range in a multi-carrier system. Two types of passive RFID tag architecture are proposed. One uses a narrow band impedance matching circuit before the envelope detector to prevent the signal from the continuous wave emitter passing through the demodulator. The other uses a band-pass SAW filter simulator, which is designed according to the specification of a real product, before the envelope detector to suppress the signal from the continuous wave emitter. Simulation results show that both tag designs can overcome the modulation depth constraint, and are in accordance with theoretical analysis. This study uses Agilent Advanced Design System software to simulate a multi-carrier passive RFID system, which is used to verify the proposed passive RFID tag design and to analyze its performance and feasibility. |
| Original Identifier: | 101NTUS5442013 |
| نوع الوثيقة: | 學位論文 ; thesis |
| وصف الملف: | 57 |
| الاتاحة: | http://ndltd.ncl.edu.tw/handle/57848612189506954242 |
| رقم الانضمام: | edsndl.TW.101NTUS5442013 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |