Open AccessMiniaturised dual‐wideband bandpass filter using novel dual‐band coupled‐line sections
Author(s) -
Xu Jin,
Wu Wen
Publication year - 2013
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.2013.1665
Subject(s) - band pass filter , return loss , wideband , stub (electronics) , multi band device , insertion loss , electronic engineering , topology (electrical circuits) , transmission line , materials science , physics , computer science , optoelectronics , engineering , electrical engineering , telecommunications , antenna (radio)
A novel dual‐wideband bandpass filter (BPF) by using the proposed dual‐band open stub‐loaded coupled‐line section is presented. The proposed dual‐band BPF has a symmetrical frequency response along the designing frequency f 0 , and the transmission zero at f 0 improves the filter band‐to‐band isolation significantly. As an example, a dual‐wideband BPF for 2.4 GHz WLAN and 6.8 GHz RFID applications is designed, fabricated and measured. The fabricated filter has the merits of simple topology, compact size, good return loss, low insertion loss and high isolation. The measurement agrees well with the simulation.