無線通訊應用之裂環共振器天線

本篇論文使用裂環共振器設計縮小槽型天線、無線感測模組應用天線、射頻辨識讀取器圓極化天線及標籤天線。首先在第二章介紹裂環共振器，從歷史與結構的角度出發。第三章介紹共面波導電容性饋入槽型偶極天線，藉由一對裂環共振器置於不同槽孔位置，在不改變其他參數條件下，達到縮小化的目的。當裂環共振器置於共面波導饋入端時，可使共振頻率達到最低，亦即達到最好的縮小效果。在降低共振頻率的同時，其天線輻射場型並沒有改變。延續第三章的概念，由於無線感測模組朝向系統整合晶片發展，因此天線設計與接地面尺寸高度相關，我們將裂環共振器當成一電容性負載，置於微帶線饋入之槽型天線，藉由負載滿足槽型天線的邊界條件，達到符合所需頻寬且縮小化之目的；同時，微帶線饋入適合直接與集總匹配電路及積體電路連接。在第四章：螺旋互補裂環共振器圓極化天線、第五章：緊緻帶狀偶極天線耦合裂環共振器，分別被提出使用於：超高頻射頻辨識讀取器與標籤應用。在讀取器應用，該圓極化天線尺寸緊緻，藉由微帶線饋入螺旋槽線，達到圓極化幅射效果，適合手持裝置使用。在標籤應用，該天線提供完整的設計步驟，使得單一架構適合與不同晶片阻抗連結，達到共軛匹配目的。此標籤天線設計，提供TRL與雙面探針平台量測天線輻射阻抗，以驗證天其模擬結果；也於無反射實驗室量測天線場型，並由TRL量測獲得的阻抗值，校正電場、磁場平面量測結果。最後，選定兩不同距離，調整讀取器的發射功率，判定是否可偵測該標籤，用以驗證該天線模擬與量測輻射場型。在此博士論文，量測與模擬皆能得到滿意的結果。

關鍵字

裂環共振器；天線；射頻辨識；無線感測

並列摘要

Split-ring resonators (SRRs) are proposed for miniaturized slot antenna, wireless sensor networks (WSNs) application, circularly polarized antenna, and tag antenna of radio frequency identification (RFID). From the perspective of the history and structure introduce the SRRs in Chapter 2. Chapter 3 addresses a slot dipole antenna fed by a coplanar waveguide (CPW) with SRRs. When resonators are placed at different positions of the slot with all other parameters unchanged, the resonant frequency can be changed. The resonant frequency of the slot can be lowered significantly when SRRs are placed close to the central feeding CPW line. By the similar concept introduced in Chapter 3, a slot antenna using capacitive load realized by SRRs is proposed as the node antenna in Chapter 4. The slot antenna fed by a microstrip line is proposed as an easy method to conjugate match to the chips using lumped elements. In Chapter 5 and Chapter 6, a spirally complementary split-ring resonators (CSRRs) antenna with circular polarization (CP) and a compact strip dipole coupled SRR antenna are proposed for RFID reader and tag applications, respectively. In reader applications, the size of circular antenna is compact, which is very suitable for the ultra-high frequency (UHF) handheld RFID reader system. In tag applications, the tag antenna has a simple and uniplanar structure to conjugate match to the chip by detail design process. The input impedance of tag antenna is measured by thru-reflect-line (TRL) calibration technique and probe technique. The radiation patterns are measured and compared to the minimum power transmitted by the reader. Good agreement between simulation and experiment is obtained.

並列關鍵字

Radio-frequency identification (RFID) ； split-ring resonators (SRRs) ； strip dipole antennas ； tag antennas.

參考文獻

[1] H. A. Boot and J. T. Randall, “Historical notes on the cavity magnetron” IEEE Trans. Electron Devices, vol. ED-23, pp. 724–729, July 1976.

[2] Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs), IEEE Standard, 2011.

[4] C. -C. Hsiao, Y.-J. Sung, S. -Y. Lau, C. -H. Chen, F. -H. Hsiao, H. -H.ua Chu, and P. Huang "Towards Long-Term Mobility Tracking in NTU Hospital’s Elder Care Center," in Proc. Int. Workshop on Smart Environments to Enhance Health Care, Seattle, WA, Mar. 2011.

[10] K. V. S. Rao, P. V. Nikitin, and S. F. Lam, “Antenna design for UHF RFID tags: a review and a practical application,” IEEE Trans. Antennas Propag., vol. 53, no. 12, pp. 3870-3876, Dec. 2005.

[13] K. W. Shepard, C. H. Scheibelhut, R. Benaroya, and L. M. Bollinger,”Split ring resonator for the argonne superconducting” IEEE Trans. Nuclear science, vol. NS-24, no.3, pp. 1147-1149, 1977

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無線通訊應用之裂環共振器天線

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