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A compact tunable microwave bandpass filter based on liquid crystal
Author(s) -
Jiang Di,
Liu Yupeng,
Yang Yuanwang,
Gan Baichuan,
Cao Weiping
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30073
Subject(s) - microwave , filter (signal processing) , liquid crystal tunable filter , materials science , band pass filter , microstrip , optoelectronics , electronic engineering , biasing , voltage , electrical engineering , engineering , liquid crystal , telecommunications
In this Letter, with the application of liquid crystal (LC) an electrically tunable microwave filter has been designed, manufactured, and characterized. The proposed compact filter has been realized on a particularly configured cavity which was constructed with low cost inverted‐microstrip structures and conventional resonance structure. By applying low square‐wave (1KHz) voltages, low power consumption is involved. The filter responses have been allocated at k ‐band of microwave frequency at which band many communications and radar applications applied. The proposed filter occupies a compact area of 19 mm × 17 mm only. The measured results have shown that the proposed filter realized the central frequency changing from 15.5 GHz to 16.5 GHz continuously with bias voltages changing between 0 and 10 V. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2470–2472, 2016