本論文採用液晶高分子(LCP)軟性基板微加工過程的28 GHz毫米波射頻晶片上集成電路帶通濾波器的設計和實現，LCP軟性基板的濾波器中採用具有低損耗和兩個傳輸零點的平面環形諧振器結構，已發現具有良好Dk和Df電性能的LCP軟板是在毫米波應用上傑出的材料。研究諧振器上不同斜角長度對濾波器反射損耗(Return loss)和通帶帶寬的敏感性。帶通濾波器中心頻率為25 GHz，反射損耗(Return loss)於-10 dB以下操作的頻率範圍在18.77~31.94 GHz，且插入損耗(Insertion loss)能達到-0.36 dB，實驗結果顯示模擬和量測具有高度的一致性。

This paper presents the design and implementation of a 28-GHz millimeter-wave RF-integrated-circuit-on-chip bandpass filter using a standard liquid Crystal Polymer (LCP) micromachining process. A planar ring resonator structure with dual-transmission zeros was adopted in the design of this LCP-based filter. The LCP substrate with good Dk and Df electrical properties is found to be a prominent material especially in the millimeter-wave applications. The component size is 8 × 8.1 × 0.1 mm³. The investigations of sensitivity to the return loss and passband bandwidth for different mitering corner shape are also studied. The filter has a 3-dB bandwidth of about 13 GHz (18.77~31.94 GHz) at the center frequency of 25 GHz. The measured insertion loss of the passband is about 0.36 dB, and the return loss is better than 10 dB within the passband.