本論文提出RIS之通道模型，這個模型包含數位相移器在不同相移狀態時之損耗以及考量天線極化的影響，使此模型更加貼合實際無線通訊環境的運用，透過這個模型可以快速驗證在RIS具有多個單元時所能獲得的增益。此外，提出了一種主動式可重構智慧表面(RIS)，主動式RIS是由輻射天線、RF數位相移器和低雜訊放大器(LNA)組成，在RIS陣列中則需要額外的功率分配器來輔助；相移器部分採用商用晶片MAPS-01044。相對於被動式RIS的架構，主動式RIS以額外功率消耗為代價，增強整體通訊環境的效率。最後驗證RIS之結構模式對於整體通訊強度之影響。
本論文進行該主動式可重構智慧表面的可行性測試並實際製作，透過架設自動化量測平台量測信號通道中的能量強度以及訊雜比，驗證本論文所提出架構帶來之效果。

This paper proposes a channel model for reconfigurable intelligent surfaces (RIS). The model takes into account the losses incurred by digital phase shifters in different phase states and considers the influence of antenna polarization, making it more suitable for practical wireless communication environments. This model enables quick validation of the gains achievable with RIS when multiple units are employed. Additionally, an active reconfigurable intelligent surface is introduced. The active RIS consists of radiating antennas, RF digital phase shifters, and low-noise amplifiers (LNA), with additional power splitters required in the RIS array. The commercially available chip, MAPS-01044, is used for the phase shifters. Compared to passive RIS architectures, the active RIS enhances overall communication efficiency at the cost of additional power consumption. Finally, the impact of the RIS structural mode on the overall communication strength is validated.
This paper conducts feasibility testing and practical implementation of the proposed active reconfigurable intelligent surface. An automated measurement platform is set up to measure the energy intensity and signal-to-noise ratio of the signal channels. This is done to validate the effectiveness of the architecture proposed in this paper.

論文審定書 i
誌謝 ii
摘要 iii
Abstract iv
目錄 v
圖次 vii
表次 x
第一章 緒論 1
1.1研究背景 1
1.2 可重構智慧表面 2
1.3被動式RIS與主動式RIS 5
1.4 RIS環境通道 6
1.5章節規劃 7
第二章 一單元RIS之通道模型驗證 8
2.1 RIS單元以及數位相移器介紹 8
2.1.1微帶天線理論 9
2.1.2微帶天線設計 11
2.1.3數位相移器 15
2.2 數位相移器及RIS模型建立 18
2.2.1數位相移器之模型 18
2.2.2 RIS單元之雷達截面積 21
2.3 RIS通道模型建立 22
2.3.1 RIS天線模式介紹 23
2.3.2 直射路徑模型 26
2.3.3 RIS通道模型 27
2.3.4 RIS通道模型驗證 29
第三章 主動式RIS實驗量測 33
3.1 主動式RIS先期實驗及量測平台介紹 33
3.1.1數位量測平台 33
3.1.2 一單元主動式RIS單元量測 34
3.2 主動式RIS數位量測平台量測結果 37
3.2.1一單元主動式RIS量測結果 38
3.2.3 兩單元(一收一發)主動式RIS量測 40
3.2.4 五單元(一收四發)主動式RIS量測 42
3.3 結構模式以及天線模式之先期測試 45
3.3.1 貼片天線與PIFA天線之比較 45
第四章 結論與未來展望 51
參考文獻 52

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