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Design of a Bandpass Filter using Two Layer Microstrip Structure  

천동완 (아주대학교 전자공학과)
박정훈 (인천전문대학 통신학과)
신철재 (아주대학교 전자공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.40, no.3, 2003 , pp. 18-24 More about this Journal
Abstract
The resonator using two layer microstrip structure was proposed and the bandpass filter was designed using this resonator in this paper. The proposed resonator structure is constructed by placing a U-shape of resonator in the first layer and then placing a broadside coupling strip in the second layer just above of the U-shape of resonator's edge part. Because these structure has various design parameters than general single layer coupled line structure, filter design is more flexible. In this paper, the narrow band filter was designed using multi-layer structure that had been applied to broadband filter because it's high coupling nature. The filter was designed to have 4MHz center frequency and 3 % fractional bandwidth, and finally confirmed that can be realizable narrow band filter by using multi-layer structure through fabrication and measurement.
Keywords
Resonator; Bandpass filter; Multilayer structure;
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  • Reference
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