Narrowband and Wideband Bandpass Filters Based on Empty Substrate Integrated Waveguide Loaded With Dielectric Elements

• Published in: IEEE access Vol. 9; pp. 32094 - 32105
• Main Authors: Maximo-Gutierrez, Clara, Hinojosa, Juan, Alvarez-Melcon, Alejandro
• Format: Journal Article
• Language: English
• Published: IEEE 2021
• Subjects: Band-pass filters; Coupling matrix synthesis; Dielectrics; empty substrate integrated waveguide; Microstrip filters; microstrip to empty substrate integrated waveguide transition; Microwave filters; narrow and wide bandpass filters; Narrowband; stepped impedance synthesis; Substrates; Wideband

Although several bandpass filters have been designed in the recently proposed empty substrate integrated waveguide (ESIW) technology to improve the quality factor and reduce losses with respect to those in SIW and planar technologies, all structures exhibit narrowband properties and none uses the de...