A Simulation Study of the Microwave Diplexer on the Superconductivity Thin Film

在超導薄膜上設計微波雙工器的數值計算研究

雷健明(Chien-Ming Lei)

《華岡工程學報》 21期 (2007/06) Pp. 117-120

https://doi.org/10.29987/CCUHKJE.200706.0017

摘要

本文中使用柴比雪夫多項式，配合耦合矩陣法成功的設計平面式雙工器，並選擇以氧化鎂為基版的釔鋇銅氧高溫超導薄膜為設計材料。將兩組由四個二分之一波長共振器組成，具有多個零點高效能帶通濾波器，相結合設計而成雙工器。利用柴比雪夫多項式具傳輸零點的特性，可以提高雙工器對頻率的選擇能力。另外利用釔鋇銅氧高溫超導薄膜零電阻的優點，在低溫下操作更可以降低微波的損耗，提高雙工器效能。詳細的設計原理與計算的結果，將於文中討論。

關鍵字

微波濾波器 ； 雙工器 ； 釔鋇銅氧

並列摘要

We use the general coupled matrix method to design the planar microwave diplexer on the superconductivity YBa2Cu3O7 (YBCO) thin film with the MgO substrate, which has an attenuation pole near cutoff frequency with each one filter. Both two high performance bandpass filters can be synthesized by using multiple λ/2-resonators and can be combined the two filters to form a diplexer. The attenuation poles will improve the selectivity of the diplexer and can be obtained by modifying the traditional Chebyshev frequency response. A practical design technique using coupling matrix synthesis algorithm with Chebyshev filtering function, including theoretical and simulated results will be demonstrated.

並列關鍵字

Microwave filter ； Diplexer ； YBCO