本論文的內容主要是設計915MHz射頻辨識系統標籤天線。首先簡單介紹射頻辨識系統的架構與基本理論基礎，接著我們以簡單的單層結構製作天線，以造價便宜之印刷電路板為基板，直接利用天線結構使天線輸入阻抗與標籤晶片阻抗匹配，達成最大功率轉移，設計出915MHZ標籤天線並實作之， 並比較天線貼於紙箱與導體之差異，設計出適用於紙箱與導體之915MHz標籤天線，並且於無反射實驗室測量所製作標籤天線之讀取距離，來驗證所設計之標籤天線之效能。此外，我們進行天線之參數分析，以研究天線的阻抗特性與天線結構之關係，提出915MHz射頻辨識系統標籤天線之設計。

This paper focuses on the design of 915MHz RFID（Radio Frequency Identification）tag antenna. First We introduce the structure of RFID and its basic theory，Then We design the antenna with a single-layer structure， and use low-cost FR4 as the subtrate . And by directly matching the antenna input impedance to the tag input impedance , the maximum power could be delivered . Then we design and implement the 915 MHz tag antenna . We also compare the difference between antennas mounted on a cardboard box or on a conductor. And design a 915 MHz tag antenna suitable for both the cardboard boxes and the conductor . We test the read distance in a non-reflection chamber to measure its performance . Besides we also analyze the antenna parameters to study the relationship between its impedance property and its structure . Thus we propose a design for the 915 MHz RFID tag antenna.

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