University of Oulu

F. Nazari, F. Ghorbani, M.A. Khak, P.J. Soh, H. Aliakbarian, A thin and low-cost scalable waveguide load absorber, AEU - International Journal of Electronics and Communications, Volume 137, 2021, 153820, ISSN 1434-8411,

A thin and low-cost scalable waveguide load absorber

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Author: Nazari, F.1; Ghorbani, F.1; Khak, M. A.1;
Organizations: 1Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran, Iran
2Advanced Communication Engineering (ACE) CoE, Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis, Pauh Putra Campus, Perlis, Malaysia
3Centre for Wireless Communication (CWC), University of Oulu, P.O. Box 4500, 90014 University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.5 MB)
Persistent link:
Language: English
Published: Elsevier, 2021
Publish Date: 2021-08-19


In this paper, a set of simple S-band waveguide absorbers are designed and implemented on a low-cost FR4 substrate. This is to provide an alternative for conventional waveguide absorbers, which are generally bulky and costly. The proposed structure is composed of only two open-ended resonator strips on a low-cost, 3.2-mm thick FR4 board. These absorbers operate with the same fundamentals as absorbers based on the frequency selective surfaces. The proposed innovative waveguide absorber load is mode-independent and designed without any connection between the strips and the waveguide. Simulations and measurements indicated an approximately 2.2% of bandwidth, with a 99% absorption rate at the center frequency. A complete parameter study is also performed to show the robustness of the design, besides enabling tuning for use in other microwave waveguides. A good agreement between simulated and measured results confirms the functionality of the absorber.

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Series: AEÜ. International journal of electronics and communications
ISSN: 1434-8411
ISSN-E: 1618-0399
ISSN-L: 1434-8411
Volume: 137
Article number: 153820
DOI: 10.1016/j.aeue.2021.153820
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2021 Elsevier GmbH. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license