臺灣博碩士論文加值系統

本論文為提升無線電力傳輸系統接收與發射傳輸效率之天線研究。論文第一部分是設計與製作一特殊錐形引導層之具高增益高指向八木平板天線。第二部是將此天線與無線電力傳輸系統整合並做電力傳輸測試。
本論文提出的八木平板天線結構中，激勵源使用平板天線設計，天線潰入點使用蜿蜒傳輸線與電容負載的設計提高天線增益， 激勵源尺寸為35.3 mm × 30.6 mm。再利用兩層平板與一層錐形引導層堆疊而成的八木天線結構，實作天線本體體積為50 x 50 x 88 〖mm〗^3。利用3D列印技術將外殼繪製列印出來，此天線外殼體積為底圓直徑78mm，高144mm之圓柱體。含外殼天線之量測反射損耗為 -21 dB，增益為8.53 dBi，天線效率 62.34 %。
將此天線整合至具6路射頻功率結合器(RF power combiner)之無線電力傳輸系統之接收機上，在17dBm之功率經由天線發射，在距離70 cm情況下，其接收總功率為 -1.01 dBm。相較利用5dBi之天線，此論文提出的八木天線，可協助無線電力傳輸系統接收功率可提升50.7%之效果，明顯可以提升電力傳輸效能。

The study proposed an antenna for improving the transmission efficiency of wireless power transmission systems. The first part of the study, a novel planar Yagi antenna with high-gain and high directivity is designed and implemented. The second part is to integrate this antenna with the wireless power transmission system and do power transmission testing.
The driver of the proposed Yagi planar antenna uses a planar antenna design, and the antenna feeding point uses the meander transmission line with the capacitive load to increase the antenna gain. The driver layer size is 35.3 mm × 30.6 mm. The Yagi antenna structure in which a two-layer flat plate and a tapered guiding layer are stacked is used to realize an antenna body size of 50 x 50 x 88 mm3. The antenna case is made by 3D printing technology. The size of the antenna case is a cylinder with a bottom diameter of 78 mm and a height of 144 mm. The measured reflection loss is -21 dB, the gain is 8.53 dBi, and the antenna efficiency is 62.34%.
The antenna is integrated into a receiver of a wireless power transmission system with a 6-port RF power combiner. The power is transmitted through the antenna at a power of 17 dBm. At a distance of 70 cm, the receiver of the wireless power transmission system received total power is -1.01 dBm. Compared with the 5dBi antenna, the proposed Yagi antenna can increase the receiving power by 50.7%, which can obviously improve the power transmission efficiency.

目錄
第一章 緒論
1.1 研究背景
1.2 物聯網裝置電力供應問題
1.2.1 電池供應問題
1.3 供電解決方案 - 無線電力傳輸
第二章 無線電力傳輸技術
2.1無線電力傳輸技術介紹
2.1.1 電磁感應電力傳輸技術
2.1.2 磁共振電力傳輸技術
2.1.3 電場耦合技術
2.1.4 射頻電波能量傳輸技術
2.2 無線電力傳輸系統架構介紹
第三章 天線基本介紹
3.1 天線概述
3.1.1 天線電路主要電性介紹
3.1.2 天線空間參數
3.2 天線種類
3.2.1 雙極天線
3.2.2 單極天線
3.2.3 平板天線
3.2.4 八木天線
第四章 高增益天線設計與量測結果
4.1 八木天線設計
4.1.1 激勵源設計
4.1.2 反射層設計
4.1.3 天線暗室設備與量測結果
4.2 天線外殼設計及量測結果
4.2.1 外殼設計
4.2.2 量測結果
4.3 天線系統整合
第五章 結論
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