Premium
Wideband bandstop filter using spurline and symmetric coupled open stubs
Author(s) -
Lee HyunSeung,
Lim JeongTaek,
Jung BangChul,
Woo JongMyung,
Kim ChoulYoung
Publication year - 2017
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.30597
Subject(s) - stopband , bandwidth (computing) , band stop filter , wideband , microstrip , electronic engineering , fractional bandwidth , transmission line , topology (electrical circuits) , materials science , computer science , band pass filter , engineering , electrical engineering , low pass filter , telecommunications
In this article, we propose a structure that can extend the stopband of the bandstop filter (BSF). The bandwidth of the BSF can be extended by symmetrically combining the BSFs that electrically couple the ends of two open stubs located in parallel on a single microstrip transmission line containing a spurline. The bandwidth of the stopband of the BSF proposed in this article is increased to 3.5 GHz. We confirm that when compared to parallel open stubs without spurline filters, the stopband bandwidth is extended by approximately 289% (rejection depth: −20 dB).