Open AccessBalanced substrate integrated waveguide filters with controllable finite transmission zeros
Author(s) -
Liu Qing,
An Na,
He Zhongyang,
Zhang Dewei,
Wang Xian,
Zhou Dongfang
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/mia2.12017
Subject(s) - waveguide , electronic engineering , transmission (telecommunications) , coupling (piping) , substrate (aquarium) , mode (computer interface) , dual mode , engineering , computer science , materials science , optoelectronics , electrical engineering , mechanical engineering , oceanography , geology , operating system
This article presents a design method for balanced substrate integrated waveguide (SIW) filters with controllable finite transmission zeros (FTZs). The balanced SIW filters are designed by combining one dual‐mode and four single‐mode SIW cavities. Characteristics of the proposed balanced SIW filters without and with cross‐coupling path are analysed in detail. The proposed balanced SIW filters can realize one or two controllable FTZs. Based on the characteristic of dual‐mode SIW cavity, good performance of common mode suppression can also be achieved. For the demonstration, some design examples with the centre frequency of 12.5 GHz are presented, and two design examples are fabricated to verify the performance of the proposed balanced SIW filters and the design method.