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http://dx.doi.org/10.5762/KAIS.2017.18.2.1

Wideband Bandstop filter Using Dual Spurline and Coupling Open Stubs  

Lee, Hyun-Seung (Dept. of Electronics Engineering, Chungnam National University)
Choi, Jee-Hwan (NARO Sapce Center, Korea Aerospace Research Institute)
Kim, Choul-Young (Dept. of Electronics Engineering, Chungnam National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.2, 2017 , pp. 1-5 More about this Journal
Abstract
In this paper, we propose a wideband band-stop filter (BSF) in order to extend the stopband of the band-stop filter using a symmetric dual spurline and the coupled open stub. First, we know that the symmetric dual spurline structure is advantageous in widening the stopband, as compared to the asymmetric dual spurline structure. So we designed a band-stop filter that combines the electrically coupled open stub (ECOS) band-stop filter with a symmetric dual spurline. We can greatly extend the stopband, when it is combined with the dual spurline and electrically coupled open stub on a microstrip transmission line, without any size increment. The stopband of the proposed band-stop filter is extended by approximately 244% (rejection depth: -20 dB) compared with a band-stop filter without a dual spurline.
Keywords
Bandstop filter; Coupling; Open Stub; Spurline; Wideband;
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