A wideband UHF high-temperature superconducting filter system with a fractional bandwidth over 108%
| Autor: | Chunguang Li, Haibo Huang, Yusheng He, Xueqiang Zhang, Yongbo Bian, Guoqiang Li, Xu Wang, Yun Wu, Liang Sun, Jia Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Low-pass filter Energy Engineering and Power Technology 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics 01 natural sciences Chebyshev filter Electronic Optical and Magnetic Materials Band-pass filter Ultra high frequency 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electronic engineering Return loss Electrical and Electronic Engineering Wideband 010306 general physics High-pass filter Passband |
| Zdroj: | Physica C: Superconductivity and its Applications. 550:78-81 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2018.04.014 |
| Popis: | A High-temperature superconducting (HTS) bandpass filter system containing a lowpass filter, a highpass filter and an LNA has been fabricated to meet the demands of wideband wireless signal receiving system. The filter system has an ultimate fractional bandwidth over 108% with the passband from 820 MHz to 2750 MHz. Besides, the filter system showed good frequency selectivity and out-of-band rejection. The 40 dB to 3 dB rectangle coefficient of our filter system is 1.4, which is better than that of an 8-pole Chebyshev filter, and the out-of-band rejection is better than 40 dB. Through systematical optimization, a return loss of better than 9.8 dB was received in the filter system. This system also showed advantages in design and fabrication precision. |
| Databáze: | OpenAIRE |
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