本論文利用多層電路板，成功以步階阻抗共振器實現一款雙頻帶濾波天線設計。雙頻帶濾波天線鮮少出現於文獻中，具有顯著之創新價值。利用此濾波天線，可將雙頻帶天線輻射體及帶通濾波器整合為單一模組，可有效縮小射頻前端所佔用之電路面積與功能區塊。
為實現該雙頻帶濾波天線，論文首先以步階阻抗共振器設計一款典型雙頻帶三階帶通濾波器，並詳細探討其設計理念、流程及實驗結果。
其次，乃進一步將該雙頻帶通濾波器之最後一階共振器，以雙頻帶微帶天線取代之，將適當設計與控制其耦合機制，以形成雙頻濾波天線。針對雙頻濾波天線之設計原理，等效電路模型、製作流程、及設計方程式，皆有詳細敘述，並佐以模擬與量測之結果驗證。

A novel dual-band filtering antenna operated at 2.45/5.8 GHz is proposed and investigated in this thesis. The proposed filtering antenna is composed of a dual-band patch antenna and two stages of half-wavelength stepped-impedance resonators. As the dual-band filtering antenna is a rare topic in the literature, it is a good topic worthy of intensive study.
To successfully develop the new dual-band filtering antenna, a typical three-pole dual-band parallel-line bandpass filter is first implemented by utilizing the half-wavelength stepped-impedance resonators. The design concept, synthesis procedure, and experimental results are carefully discussed.
Then, by replacing the last stage of the three-pole filter with a patch antenna as a low-Q resonator and appropriately adjusting the coupling mechanism, a dual-band filtering antenna is realized on three-layer PCB process. The operational principle, synthesis equations, equivalent circuit model, design procedure, and experimental results are given and discussed in detail in this thesis.

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