本論文針對應用於行動裝置的邊框天線架構進行設計與效能驗證，提出一款具備雙頻操作能力的可調諧平面倒F型天線（PIFA），涵蓋低頻段600~960 MHz 與高頻段2300–2690 MHz，適用於現今主流的sub-6GHz通訊需求。為突破傳統上使用SMA接頭進行量測的限制，本研究將毫米波常見的探針下針(Probe Feeding)技術導入至sub-6GHz 天線量測中，設計以共平面波導接地（CPWG）為基礎、搭配四分之一波長阻抗轉換器與微帶傳輸線的饋入架構，使整體量測更加輕量化且模組化。
論文中探討了在已知天線輻射效率的前提下，如何透過下針量測所得之反射參數（S11），配合正確的效率公式推估總效率，藉此降低初步在進行匹配網路設計時依賴大型暗室設備的次數，達到節省實驗資源與提升開發效率的目的。在系統架構設計上本論文共提出兩種架構，第一種是在饋入端加入 Impedance Tuner，以改善高頻段之阻抗匹配與頻寬響應；第二種為再於接地端引入 Aperture Tuner，有效提升低頻段的輻射效率。最終成功實現一種具雙諧振特性的邊框型天線，並藉由探針量測結合理論公式完成整體總效率的估算，驗證所提方法之可行性與實用性。

This thesis proposes and verifies the performance of a frequency-agile planar inverted-F antenna (PIFA), designed to integrate seamlessly within the structural frame of a mobile platform. The antenna supports dual-band functionality across the 600–960 MHz and 2300–2690 MHz spectrums within the sub-6 GHz domain.
To address the limitations of traditional SMA-based measurements—especially in compact sub-6 GHz designs—a probe-fed measurement scheme is adopted, inspired by techniques commonly utilized in millimeter-wave testing. The proposed feeding structure employs a CPWG-based design with an integrated quarter-wavelength transformer and a microstrip line, enabling modular and space-efficient implementation.
Furthermore, this work introduces a method for approximating system-level efficiency by utilizing known radiation efficiency and measured S₁₁ data, reducing dependence on anechoic chamber testing during impedance tuning iterations. Two antenna configurations are examined: the first incorporates an impedance tuner at the feed interface to enhance high-frequency impedance matching and bandwidth, while the second introduces an aperture tuning element at the ground terminal to boost radiation efficiency in lower-frequency bands.
The final design achieves dual-resonance behavior, and probe-based measurements successfully verify the system efficiency estimation approach, demonstrating the proposed method’s practicality and effectiveness.

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