本論文為雙頻段15位元被動式RFID tag，可應用於室內定位系統。雙頻段為866/925MHz的power link與data link 433MHz，Tag收集925MHz的連續弦波訊號轉換為電壓提供電路的電源，而433MHz為Reader傳送資料調變過後的訊號給Tag，Tag利用此資料比對是否為正確的ID code，如正確則利用power link反散射15-bit ID code 給Reader。
本論文沒有使用穩壓器與震盪器，利用low power voltage reference circuit 取代穩壓器，時脈則由data中解碼出，優點可以降低功率損耗，讓最低靈敏度下降，且增加動態範圍，量測最低讀取功率power link為-19.6 dBm、data link為-31 dBm，本論文利用台灣積體電路(TSMC) 0.18um Mixed signal/RF 1P6M CMOS製程實現。

This thesis presents a fully integrated dual-band 15-bit passive radio-frequency-identification(RFID) tag chip. The tag is used in an RFID indoor localization system. We employ dual-band communication link (power link and data link) respectively in 866/925MHz and 433MHz. the tag converts the power captured from 925-MHz continuous wave to DC voltage for the whole chip. It also receives the ID code modulating 433MHz signal from the reader. If the ID code is correct, the tag will backscatter the 15-bit ID code to the reader using the power link.
There are no regulator and oscillator in the proposed tag, we use a low power voltage reference circuit to replace the regulator. The clock is extracted from the received PIE signal, thus no oscillator is required. The advantages are not only reducing the power consumption, but also improving the lowest sensitivity and increasing the dynamic range. The input sensitivity of the power link at -19.6 dBm and the data link at -31dBm were observed. The proposed RFID tag is designed in TSMC 0.18um mixed signal/RF 1P6M CMOS process.

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