Open AccessGeneralised Chebyshev function bandpass filters in box‐like topologies based on the properties of dual‐mode loop microstrip resonator
Author(s) -
Liu Qing,
Zhou DongFang,
Zhang DeWei
Publication year - 2019
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/iet-map.2018.5217
Subject(s) - chebyshev filter , microstrip , topology (electrical circuits) , band pass filter , resonator , loop (graph theory) , pole–zero plot , prototype filter , filter (signal processing) , electronic engineering , mathematics , physics , transfer function , engineering , filter design , mathematical analysis , optics , electrical engineering , combinatorics
A new class of compact microstrip bandpass filters in doublet topology based on a dual‐mode loop microstrip resonator with controllable locations of input/output feeding lines is presented and researched. Filters with up to five poles are proposed and researched. Diagonal cross‐coupling path in box‐like topology can be introduced to produce a finite transmission zero (TZ) with controllable position. Some design examples are provided to illustrate the performances of the proposed two‐, three‐, four‐ and five‐pole filters with controllable TZs. A three‐pole and a five‐pole filters were fabricated and measured. Good agreement is achieved between the simulated and the measured results.