A 12-pole VHF band high selective high temperature superconducting filter

被引：1
作者：
Yu, Xiao [1 ,2 ]
Xi, Weibin [3 ]
Wu, Songtao [3 ]
Yan, Peiguang [1 ]
机构：
[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2021年 / 34卷 / 01期
关键词：
HTS filter; VHF band; quarter-wavelength resonator; high selectivity; MOBILE COMMUNICATION; PERFORMANCE;
D O I：
10.1088/1361-6668/abbec5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A 12-pole VHF band high temperature superconducting (HTS) filter with a spiral quarter-wavelength resonator is introduced. The coupling characteristics of the proposed resonator, cross structure and external quality factor is analyzed in detail. The HTS filter is fabricated on a 3-inch-diameter double-sided DyBa2Cu3O7 HTS thin film with a LAO substrate and measured with a low-temperature test system at 77 K. The measured filter has a center frequency of 119.93 MHz and a 1-dB passband of 10.04 dB. Due to the introduction of transmission zeros, the rectangular coefficient (BW60dB/BW1dB) of the measured filter is about 1.20, which shows excellent selectivity. The measured results are in good agreement with the simulated ones.
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页数：7
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