Open AccessCompact and high selectivity dual‐mode microstrip BPF with frequency‐dependent source–load coupling
Author(s) -
Deng HongWei,
Liu Fei,
Xu Tao,
Sun Liang,
Xue YiFan
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.4160
Subject(s) - dual mode , coupling (piping) , microstrip , dual (grammatical number) , selectivity , mode (computer interface) , frequency selectivity , optoelectronics , electronic engineering , materials science , physics , topology (electrical circuits) , computer science , electrical engineering , engineering , chemistry , art , biochemistry , literature , metallurgy , operating system , catalysis
In this letter, a dual‐mode microstrip bandpass filter (BPF) with compact size and high selectivity is designed with a short‐stub centred loaded resonator. Owing to the frequency‐dependent source–load coupling and the intrinsic characteristics of the short‐stub loaded resonator, three transmission zeros that are located near the passband edges and in the upper‐stopband can be generated to improve the selectivity. The compact BPF with fractional bandwidth of 3.5% located at 2.4 GHz for WLAN application has been designed and fabricated, and good agreement between simulation and measurement verifies the validity of this design methodology.