Premium
A new multipassband filter with multiple transmission zeros based on quarter‐wavelength resonators in wireless communication systems
Author(s) -
Cao Xin,
Tang Zongxi,
Wang Fei,
Wu Yunqiu,
Zhang Biao
Publication year - 2015
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.29031
Subject(s) - resonator , microwave , filter (signal processing) , wireless , microwave transmission , transmission (telecommunications) , electronic engineering , wavelength , communications system , band pass filter , engineering , acoustics , computer science , telecommunications , electrical engineering , physics , optics
In this article, a new multipassband filter with multiple transmission zeros (TZs) based on quarter‐wavelength resonators (QWRs) is proposed. Three pairs of QWRs are utilized to produce three passbands and three TZs, and the center frequencies of the passbands can be flexibly controlled by changing the length and width of the corresponding resonators without major influence on the other passbands. It is proved from the simulated and measured results that the proposed filter has some excellent properties such as low in‐band insertion loss, great out‐band rejection and compact size. The designed filter has the working frequencies of 1.9 GHz (Global System for Mobile Communication), 2.6 GHz (4G Communication), and 5.2 GHz (Worldwide Interoperability for Microwave Access) and can be applied in the multiprotocol wireless communication systems. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1105–1107, 2015