Premium
A novel and compact 3.5 GHz tunable bandpass filter in SIW technology with shunt‐inductive discontinuities switched by pin diode switches
Author(s) -
Caleffo Ricardo Caranicola,
Correra Fatima Salete
Publication year - 2021
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.32640
Subject(s) - band pass filter , shunt (medical) , insertion loss , bandwidth (computing) , materials science , offset (computer science) , pin diode , electronic engineering , electrical engineering , optoelectronics , classification of discontinuities , diode , wimax , engineering , computer science , telecommunications , wireless , medicine , mathematical analysis , mathematics , cardiology , programming language
Abstract This article presents a novel tunable bandpass filter designed in substrate integrated waveguide (SIW) technology to operate at 3.5 GHz, a frequency widely used in 5G and WiMAX systems. The bandpass filter uses shunt‐inductive discontinuities provided by a novel offset post arrangement that resulted in a compact filter. The filter bandwidth is tunable through PIN diode switches connected to the metal posts, allowing three different operation states. The novel tunable filter was fabricated and demonstrated bandwidths of 6.23% and 0.714% centered at 3.5 GHz, with low insertion losses. The measured results are in good agreement with full‐wave simulation results.