Dual-Band Superconducting Bandpass Filter Using Quadruple-Mode Resonator
Dual-Band Superconducting Bandpass Filter Using Quadruple-Mode Resonator
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DOI：
10.1109/tasc.2013.2294872
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发表时间：
2014-04
影响因子：
1.8
通讯作者：
Haiwen Liu;Pin Wen;Yulong Zhao;Baoping Ren;Xiaomei Wang;X. Guan
中科院分区：
文献类型：
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作者：
Haiwen Liu;Pin Wen;Yulong Zhao;Baoping Ren;Xiaomei Wang;X. Guan
利用四模谐振器实现了一种高温超导带通滤波器。该谐振器由一个半波长均匀阻抗谐振器、一个位于对称平面内的开口短截线和两个位于对称平面两侧的螺旋开口短截线组成。利用奇/偶模理论分析了四模谐振器的特性，并给出了双通带滤波器的设计图。一个双频高温超导带通滤波器的中心频率为1.8 GHz的GSM应用和2.4 GHz的无线局域网应用的设计使用建议的四模谐振器，这是通过在0.5 mm厚的MgO衬底上沉积YBCO薄膜制造。其尺寸仅为13 mm × 17 mm，测量结果表明，通带内插入损耗小于0.25dB。此外，在两个通带之间实现了一个传输零点，在较高通带的上阻带实现了两个传输零点，改善了滤波器的边缘选择性和阻带特性。
A dual-band high-temperature superconducting (HTS) bandpass filter (BPF) using a quadruple-mode resonator is realized in this paper. The resonator consists of a half-wavelength uniform impedance resonator, an open stub in a symmetrical plane, and two spiral open stubs at the two sides of the symmetrical plane. Distinct characteristics of the quadruple-mode resonator are investigated by using even/odd mode theory, and the design graphs are given to analyze the dual-band filter. A dual-band HTS BPF with central frequencies of 1.8 GHz for GSM applications and 2.4 GHz for wireless local area network applications is designed using the proposed quadruple-mode resonator, which is fabricated by depositing YBCO films on a 0.5-mm-thick MgO substrate. Its size occupies only 13 mm × 17 mm. Measured results demonstrate that an insertion loss within the passbands is less than 0.25 dB. In addition, a transmission zero is achieved in-between two passbands, and two transmission zeros are realized in the upper stopband of the higher passband, which improve the skirt selectivity and stopband characteristics of the filter.