釔鋇銅氧超導微波濾波器設計及製作

Abstract

摘要 本論文是利用髮夾式共振電路之交錯耦合型微帶線帶通濾波器的架構以及零度饋入的方式來設計高溫超導濾波器。我們以RF濺鍍技術已成功地將中心頻率為2.205GHz的釔鋇銅氧帶通濾波器製造在面積為2×2cm2的氧化鎂 (MgO)基板上。顯示此元件的插入損耗為0.1dB，頻寬為9.6MHz，反射損失為15 dB。量測的結果與我們預期相符合，濾波器具有兩對的傳輸零點較好。Abstract We report the measurement result of a cross-coupled high-temperature superconducting microstrip bandpass filters made by using hairpin resonators and 0° feed-in transmission dots. This microwave filter was made of YBCO superconducting thin film and designed for a center frequency of 2.205 GHz. It was fabricated on a 2×2 cm2 MgO substrate by a RF sputtering technique. The measurements show that the insertion loss, return loss, and bandwidth are respectively, about 0.1dB, 15dB and 9.6MHz. Our results demonstrate that the filter with two pair transmission zeroes will have better performance.