在這篇論文裡我們提出一個新的多頻段被動式射頻辨識系統，本系統之讀取機由收發機與連續波發射機所組成，而連續波發射機較收發機靠近標籤。此連續波發射機使用載波頻率fc供給被動式標籤之內部晶片需求能量。而收發機只傳送載波頻率ft之讀取機指令。而此兩個載波頻率fc與ft可以為相同或不同。論文中，我們將分析收發機與連續波發射機兩頻段之頻率差、最大讀取距離及讀取機指令需求之調變深度等實驗結果。
採用較長接收距離及多頻段反向散射訊號之優點，本系統將可以達到較高之訊雜比及抗訊號衰弱等能力。此外本收發機可比平常之整合式收發機更省電。

In this thesis, we propose a new multi-band passive radio frequency identification system in which a reader is composed of a transceiver and a continuous wave emitter (CWE). The CWE is closer to tags than the transceiver. The CWE provides the required power of a passive tag by charging electronic microchip within tags using carrier frequency fc. The Reader-to-Tag command at carrier frequency ft is transmitted to tags by the transceiver. The two carrier frequencies fc and ft can be at the same or different. In this thesis, the frequency differences between the transceiver and the CWE, maximal readable distance, the required modulation depth of reader command are analyzed based on empirical results.
Taking the advantages of the accessible range extension and the multi-band backscattering, the proposed scheme can achieve higher SNR and better anti-fading ability. Furthermore, the power consumption of the transceiver in this new RFID system can be less than an ordinary integral reader.

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