A self-equalized HTS filter for future mobile communication applications

作者：Zuo T; Fang L; Wu Z Z; Zhou T G^*; Ji L; Xie Q L; Zhang X; Yan S L; Zhao X J; Zuo X

来源：Physica C-Superconductivity and Its Applications, 2007, 459(1-2): 1-4.

DOI：10.1016/j.physc.2007.03.396

• HTS
• filter
• self-equalization
• group delay

A 10-pole self-equalized high-temperature superconducting (HTS) filter is presented in this paper. The filter has a fractional bandwidth of 0.51% at 1955 MHz, simulated in Sonnet, and is fabricated using double-sided Tl2Ba2CaCu2O8 film on 0.5 mm thick LaAlO3 substrates. The filter consists of 10 novel quasi-lumped resonators and an additional microstrip which is used to realize the real-axis transmission zeros (TZs). The simulated group delay ripple over the central 55% of the filter's passband is 5.6 ns, and a close result of phase response is achieved in laboratory test. The measured insertion loss of the filter is less than 0.2 dB, the out-of-band rejection is better than 75 dB and the slope is better than 22 dB MHz(-1) at band edge.

• 出版日期2007-8-1
• 单位南开大学