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A novel modular CSRR-based SLA 3D printed waveguide filter for c-band radar applications: suitable for various substrate thicknesses

Published online by Cambridge University Press:  22 January 2026

Habib Dogan Open the ORCID record for Habib Dogan [Opens in a new window] ,
Abdullah Genc Open the ORCID record for Abdullah Genc [Opens in a new window] ,
Abdulrahman Nasser Abass Abdo ,
Sinan Bicer  and
Selçuk Helhel
Habib Dogan*
Affiliation:
Burdur Mehmet Akif Ersoy University, Gölhisar School of Applied Sciences, Department of Computer Technology and Information Systems, Gölhisar, Burdur, Türkiye
Abdullah Genc
Affiliation:
Isparta University of Applied Sciences, Faculty of Technology, Department of Mechatronics Engineering, Isparta, Türkiye
Abdulrahman Nasser Abass Abdo
Affiliation:
Isparta University of Applied Sciences, Faculty of Technology, Department of Mechatronics Engineering, Isparta, Türkiye
Sinan Bicer
Affiliation:
Akdeniz University, Elmalı Vocational School, Department of Electricity and Energy, Antalya, Turkiye
Selçuk Helhel
Affiliation:
Burdur Mehmet Akif Ersoy University, Gölhisar School of Applied Sciences, Department of Computer Technology and Information Systems, Gölhisar, Burdur, Türkiye Akdeniz University, Industrial and Medical-Based Microwave Research Center, Antalya, Turkiye
*
Corresponding author: Habib Dogan; Email: hdogan@mehmetakif.edu.tr
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Abstract

The design of filters used in waveguides, which are crucial components of high-frequency communication systems, plays a significant role in improving system performance. In this study, the usage of metamaterials is first proposed, the SLA 3D printing method is used to design and fabricate CSRR meta-resonators-based bandpass waveguide filters (WGFs) with different filter orders for C-band (4-7.5 GHz), and simulated and measured filter performances are compared. Since the proposed novel WG structure is modular, it allows the design of C-band WGFs using different thicknesses of substrate materials. Also, the number of unit elements can be increased and any number of meta-resonators can be inserted to design filters of different orders ranging from 1 to 5. The electrical length of the WGF/WG structure can be changed according to the needs of the applications. The resulting WGFs demonstrated superior RF performance, being 50% lighter than comparable models found in the literature. Over the relevant frequency range, the filter exhibited return losses between 31-43 dB, insertion losses from 0.1 to 0.35 dB, FBW ranging from 12% to 16%, and quality factors between 6.23 and 8.28, depending on the filter order. The obtained experimental results align closely with the simulation predictions, confirming the effectiveness of the design.

Keywords

c-bandcomplementary split ring resonator (csrr)meta-resonatorstereolithography (sla)waveguide filter (wgf)

Information

Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 17 , Issue 10 , December 2025 , pp. 1749 - 1762
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Copyright
© The Author(s), 2026. Published by Cambridge University Press in association with The European Microwave Association.

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