高溫超導超寬頻雙頻帶帶通微波濾波器之研究─利用步階阻抗開路殘段製作

Characteristics of Ultra-Wideband Dual-Bandpass High-Tc Superconducting Microwave Filters with Stepped-Impedance Open Stubs

林學翰(Xue-Han Lin)

指導教授 ： 王立民

國立臺灣大學/理學院/物理研究所/碩士(2013年)

https://doi.org/10.6342/NTU.2013.01746

摘要

為應用於日本的短程、高速傳輸無線通訊規格—3-10 GHz頻寬，其中有4.8到7.2 GHz止帶，我們設計了具有的超寬頻(UWB)的雙通帶濾波器(DBPF)，實作方面以高溫超導步階阻抗共振器(SIR)及耦合線，組成多模態共振器(MMR)，為此濾波器的基礎架構。為了抑制4.8-7.2 GHz的訊號，在MMR上採用了四分之一波長步階阻抗開路殘段。此超寬頻濾波器有兩個傳輸零點，模擬結果顯示第一個通帶為3.43 GHz到5.77 GHz，並有小於0.028 dB的插入損耗、大於10.3 dB的反射損耗。第二個通帶為6.20 GHz到8.93 GHz，並有小於0.013 dB的插入損耗、大於10 dB的反射損耗。在6 GHz止帶的穿透係數大於35 dB。使用脈衝雷射沉積系統製備雙面高溫超導(HTS)薄膜並經由黃光微影製程實作濾波器，並整合於鍍金的封裝盒。

關鍵字

高溫超導 ； 超寬頻 ； 雙通帶 ； 步階阻抗 ； 多模態共振器

並列摘要

A novel ultra-wideband (UWB) dual-bandpass filter (DBPF) is designed for applications on 3-10 GHz with 4.8 to 7.2 GHz rejection band short-range and high-speed wireless communication under the Japanese radio regulations. High-Tc superconducting stepped impedance resonators and coupled-line sections are incorporated with multiple-mode resonators (MMR) to form the basic filter structure. To inhibit the signals ranged from 4.8- to 7.2-GHz, quarter-wavelength stepped-impedance open stubs are implemented on the MMR. The design of the proposed UWB filter has two transmission bands. The simulation results show the first passband from 3.43 GHz to 5.77 GHz has less than 0.028 dB insertion loss and greater than 10.3 dB return loss. The second passband within 6.20 GHz and 8.93 GHz has less than 0.013 dB insertion loss and greater than 10 dB return loss. The rejection at 6.0 GHz is better than 35 dB. The filter was made out of patterned double-sided Pluse Laser deposited HTS films integrated with a gold-coated housing.

並列關鍵字

high-Tc superconducting ； ultra-wideband ； dual-bandpass ； stepped impedance ； multiple-mode resonators

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