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題名 | An Antenna System Design for UHF RFID Applications=應用於超高頻無線射頻辨識的天線系統設計 |
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作者姓名(中文) | 李彥廣; 林明宏; 邱建文; 王煌城; | 書刊名 | 宜蘭大學工程學刊 |
卷期 | 7 2011.12[民100.12] |
頁次 | 頁46-63 |
分類號 | 448.813 |
關鍵詞 | 無線射頻辨識; 被動式標籤天線; 蜿蜒-貼片天線; 背散射調變; 無線鏈結預測; RFID; Passive tag antenna; Meandered antenna; Back scattering modulation; Radio link budget; |
語文 | 英文(English) |
中文摘要 | 本文旨在介紹一個操作在超高頻之無線射頻辨識應用天線系統。此無線射頻辨識裝置結合嵌入式系統可應用於瓦斯鋼瓶配送(LPG)及管理。為了減少天線占用的空間,吾人使用一個摺疊蜿蜒式貼片單極天線來作為手持式讀取器的天線。為了滿足低成本的需求,吾人利用印刷偶極天線來設計被動式標籤之天線,並使用T型匹配技術來調整與轉換輸入阻抗。在無線射頻辨識裝置中,印刷偶極天線被設計來與德州儀器公司所製造之微晶片的輸入阻抗達到共抗匹配。天線的設計與模擬均使用Ansoft公司的HFSS模擬軟體,本研究計算天線的設計參數如反射損失、天線增益、雷達截面積等,然後將模擬的結果與實驗量測結果比較來驗證所設計天線之準確性。此外,本研究利用無線鏈結概算來評估訊號發射至被動式標籤天線時,經由背散射所接收的功率,來推估此無線射頻辨識系統的讀取距離。 |
英文摘要 | This paper presents an antenna system operating in the UHF band for RFID applications. The RFID module is deployed for LPG delivery and management and is incorporated as part of an embedded system. To reduce the space taken by the antenna, a folded meandered-patch monopole is adopted for the antenna of the handheld reader. On the tag side, in order to meet the low cost requirement, a printed dipole antenna is used with the passive tag. T-matching technique is employed to step up the input impedance so that the printed dipole antenna is conjugately matched with the RFID tag microchip manufactured by Texas Instrument (TI). The reader and tag antennas are designed and simulated using the HFSS software. Parameters including return loss, gain, and radar cross section of the antennas are evaluated. Then the simulated return loss of each antenna is compared with the measured result to verify the proposed design. In addition, radio link budgets that describe the backscatter power link of a passive RF tag are evaluated to estimate the read range of the RFID system. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。