Open AccessHigh‐selectivity dual‐mode dual‐band microstrip bandpass filter with multi‐transmission zeros
Author(s) -
Ieu Wangshuxing,
Zhang Dewei,
Zhou Dongfang
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.4103
Subject(s) - band pass filter , microstrip , dual mode , dual (grammatical number) , multi band device , transmission (telecommunications) , electronic engineering , filter (signal processing) , computer science , electrical engineering , telecommunications , engineering , antenna (radio) , art , literature
A dual‐mode dual‐band microstrip bandpass filter using the hybrid structure resonator derived from microstrip patch is proposed. Microstrip rectangular rings are used to excite the TE 200 mode and TE 002 mode of microstrip patch resonator, forming the high‐frequency passband while it also works as a resonator which provides the low‐frequency passband. The designed filter has 11 transmission zeros, resulting in good selectivity and good out‐band rejection, extending the stopband, with a size of 0.45 λ g × 0.41 λ g . The measured results are in a good agreement with simulated results.