- 學位論文
125kHz/13.56MHz無線射頻身份識別系統之研製
The Study and implementation of 125kHz/13.56MHz RFID System
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摘要
目前無線射頻身份識別系統（Radio Frequency Identification System, RFID）的應用已相當普遍，但主要關鍵組件大多為國外大廠所掌握，僅有少數國內廠商有能力著手發展關鍵組件。本論文研究發展完成二套無線身份識別系統，可應用於門禁管制、停車場管理及互動式玩具。125kHz無線身份識別系統為雙頻雙天線架構，讀取機使用兩天線，一天線用於發射訊號至應答器，另一天線用於接收應答器之回應訊號。應答器電源及系統時脈係由讀取機以250kHz之射頻訊號充電，應答器並將識別碼以125kHz之載波作DPSK調變回應給讀取機，讀取機對回應訊號進行濾波、放大及解調以讀取應答器回應之識別碼，此一系統之設計將可使應答器與讀取機距離小於25公分時進行資料讀取動作。而13.56MHz無線身份識別系統係針對短距離，低成本而設計。應答器使用PWM調變方式回應識別碼給讀取機。此一系統可使應答器與讀取機距離小於10公分時進行資料讀取動作。 本論文研究所涉及之技術領域包括讀取機天線、讀取機接收濾波器、讀取機放大器、讀取機解調電路、應答器天線、應答器調變電路之設計。從系統規格制定、電路設計到系統測試，所有電路均自行研製，或與國內IC設計公司合作開發完成。
並列摘要
Recently RFID system had been adopted widely in many applications, but the key components are still supplied by the international manufactures. Only a few of local companies have this capability to develop the key components of RFID system. In this thesis, we had accomplished two RFID Systems, which may be applied to access control, parking management and interactive toys. 125kHz RFID system is designed by dual band and dual antenna architecture. The reader contain two antennas, one is for transmitting signal for transponder, and the other one is for receiving respond signal from transponder. Transponder is charged by the reader through the air with 250kHz magnetic signal, then transponder will respond ID code by DPSK modulation at 125kHz. Reader will filter, amplify, and demodulate the signal to analyze the responding code. This design can be operated within the distance of 25 cm. And the 13.56MHz RFID system is especially designed for short range and low cost application, using PWM modulation at 13.56MHz, this design can work within the distance 10 cm. The technology involved in this thesis is very wide including antenna, filter, amplifier, and demodulator circuit for reader and transponder. All system from system spec to circuit design and testing use our own design or co-operate with local IC design companies.
參考文獻
[5] Texas Instruments Registration and Identification System
[6] microID™ 13.56 MHz RFID System Design Guide, 1999, Microchip Technology Inc.
[7] microID™ 125kHz RFID System Design Guide, 1998, Microchip Technology Inc.
pp31-34, July 1993.
[11] 楊承翰，“以0.35um CMOS 積體電路技術設計13.56MHz