1. HTSC Cascaded Linear-Phase Filter with Quasi-Elliptic Response
- Author
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Zheng Xiang Luo, Tian Liang Zhang, Kai Yang, Jun Tan Tang, Ling Zang, Xiang Yang Ren, and Yi Fei Zhang
- Subjects
Physics ,Filter design ,Control theory ,Butterworth filter ,Elliptic filter ,Prototype filter ,General Medicine ,Topology ,Band-stop filter ,Passband ,Linear phase ,All-pass filter - Abstract
In view of the difficulty of designing a high-order linear phase filter with prototype parameters directly, this paper proposes a new approach to rapidly construct a high order linear phase filter through cascading two same low-order linear phase filters. A twelve-order HTSC cascaded linear phase filter is fabricated on YBCO/LaAlO3/YBCO substrate with the dimension of 44.1mm ×31.4mm. The measured result shows that the filter has a 56 MHz passband at a center frequency of 1993 MHz. The minimum insertion loss in the passband is 0.59 dB. The group delay variation in passband is less than 5 ns over 78.5% of the filter bandwidth which is in good agree with the simulation result.
- Published
- 2014
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