TY - JOUR

T1 - Synthesis of dielectric-loaded waveguide filters as an inverse problem

AU - Aydoğan, Ahmet

AU - Akleman, Funda

N1 - Publisher Copyright:
© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2022

Y1 - 2022

N2 - A design strategy is proposed for microwave devices built with dielectric-loaded waveguides having one- or two-dimensional discontinuity profiles. The problem is formulated as an inverse problem where the pre-defined scattering parameters are aimed to be the final response of the system. This goal is achieved by optimizing the dimensions of the filling materials. To increase the success of the optimization, the problem is reduced to the longitudinal and widthwise thickness determination of the unit cell, which constitutes the whole structure in a cascade form. To this aim, the frequency response of the unit cell is targeted and then that of the whole system, which is achieved by a two-level optimization procedure of the unit cell. The usefulness of the proposed design strategy is shown through numerical examples as well as the measurement results of two prototypes.

AB - A design strategy is proposed for microwave devices built with dielectric-loaded waveguides having one- or two-dimensional discontinuity profiles. The problem is formulated as an inverse problem where the pre-defined scattering parameters are aimed to be the final response of the system. This goal is achieved by optimizing the dimensions of the filling materials. To increase the success of the optimization, the problem is reduced to the longitudinal and widthwise thickness determination of the unit cell, which constitutes the whole structure in a cascade form. To this aim, the frequency response of the unit cell is targeted and then that of the whole system, which is achieved by a two-level optimization procedure of the unit cell. The usefulness of the proposed design strategy is shown through numerical examples as well as the measurement results of two prototypes.

KW - Dimensional optimization

KW - inverse design

KW - rectangular waveguide

KW - reverse engineering

KW - synthesis of microwave devices

UR - http://www.scopus.com/inward/record.url?scp=85147327266&partnerID=8YFLogxK

U2 - 10.1080/27690911.2022.2081321

DO - 10.1080/27690911.2022.2081321

M3 - Article

AN - SCOPUS:85147327266

SN - 2769-0911

VL - 30

SP - 376

EP - 396

JO - Applied Mathematics in Science and Engineering

JF - Applied Mathematics in Science and Engineering

IS - 1

ER -