Publication:
Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology

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URI: https://hdl.handle.net/10016/19465
ISSN: 0895-2477
DOI: 10.1002/mop.27812
UXXI: AR/0000013791
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microwave_MOTL_2013_ps.pdf (652.42 KB)
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2013-10
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Wiley
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Abstract
In this article, the design, fabrication, and characterization of a tunable microwave notch filter based on liquid crystal (LC) using inverted-microstrip technology is presented. A spiral spurline structure is used because of its good performance as a single-resonator notch filter. Based on the LC dielectric anisotropy, a voltage-controlled rejection frequency of the filter is achieved, ranging from 3.40 to 3.75 GHz, which means that the tuning range relative to the central rejection frequency is about 10%. At the same time, this device exhibits negative group delay around the rejection frequency and the measured values throughout the tuning frequency range are presented.
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LCs, Notch filter, Spiral spurline structure, Tunable devices
Bibliographic citation
Microwave and Optical Technology Letters (2013), 55 (10), 2420-2423.
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