A reconfigurable narrow-band bandpass filter using electrically-coupled open-loop resonators based on liquid crystals

被引:2
作者
Choi, Jin-Young [1 ]
Ma, Jun-Seok [1 ]
Oh, Hyunwoo [1 ]
Kim, Wook-Sung [1 ]
机构
[1] POSTECH, Dept Elect Elect Engn, Pohang, Gyeongbuk, South Korea
关键词
microwave filter; liquid crystals; tunable circuits and devices; narrow-band; open loop resonator; PASS FILTER; COMPACT;
D O I
10.1088/1361-6463/ad6dd0
中图分类号
O59 [应用物理学];
学科分类号
摘要
This paper introduces an electrically reconfigurable narrowband bandpass filter that exploits liquid-crystal technology. The filter uses two electrically-coupled open-loop resonators to produce two transmission zeros, resulting in a more compact structure than a single open-loop resonator. The spacing between resonators contributes to easy manipulation of the fractional bandwidth (FBW) and return loss. Theoretical calculations of the electrical length using multilayer microstrip line equations are presented. Experimental results demonstrate that the center frequency can be tuned from 9.70 GHz to 10.86 GHz with a maximum bias voltage of 30 V, achieving a tuning range of 11.34%. With applied bias, the maximum FBW reaches 8.10% and the maximum return loss attains 15.97 dB in each biased state.
引用
收藏
页数:10
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共 38 条
[31]   ULTRA-NARROW BAND BAND-PASS FILTER USING OPEN LOOP RESONATOR [J].
Zhang, F. .
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2010, 52 (09) :2029-2031
[32]   Compact microstrip dual-band bandpass filter using short-circuited stub-loaded open loop resonators [J].
Ma, Xing-Bing ;
Zhang, Feng-Shan .
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2014, 56 (07) :1651-1653
[33]   Design of a low-loss microstrip diplexer with a compact size based on coupled meandrous open-loop resonators [J].
Rezaei, Abbas ;
Yahya, Salah, I ;
Nouri, Leila ;
Jamaluddin, Mohd H. .
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 2020, 102 (03) :579-584
[34]   Design of a low-loss microstrip diplexer with a compact size based on coupled meandrous open-loop resonators [J].
Abbas Rezaei ;
Salah I. Yahya ;
Leila Nouri ;
Mohd H. Jamaluddin .
Analog Integrated Circuits and Signal Processing, 2020, 102 :579-584
[35]   Tri-band Bandpass Filter using Open Loop Resonator Loaded by One Stub with Three Branches [J].
Ma, Xingbing ;
Zhang, Fengshan ;
Liang, Caifeng .
APPLIED SCIENCE, MATERIALS SCIENCE AND INFORMATION TECHNOLOGIES IN INDUSTRY, 2014, 513-517 :2791-2794
[36]   Tunable bandpass filter based on epsilon-near-zero metamaterials using liquid crystals [J].
Mu, Huilin ;
Ding, Chang ;
Yi, Tong ;
Wang, Yudeng ;
Meng, Fanyi ;
Wang, Jiafu .
LIQUID CRYSTALS, 2024, 51 (05) :773-782
[37]   Compact dual-band bandpass filter with high-passband isolation using coupled lines and open stub [J].
Kishore, Simhadri ;
Arora, Ayan ;
V. Phani Kumar, Kanaparthi ;
Velidi, Vamsi Krishna ;
Nayak, Chittaranjan ;
Rao, Thipparaju Rama ;
Rajkumar, Rengasamy .
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2021, 63 (11) :2710-2714
[38]   Labyrinth double split open loop resonator based bandpass filter design for S, C and X-band application [J].
Alam, Jubaer ;
Faruque, Mohammad Rashed Iqbal ;
Islam, Mohammad Tariqul .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2018, 51 (26)