Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Faculty Publications Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource Patel, Shrawan K.; Barik, Rusan Kumar; Dewangan, Niraj Kumar; Koziel, Slawomir Title A name given to the resource Design and experimental validation of multi-section directional coupler with arbitrary coupling and high directivity for sub-6 GHz UWB applications Date A point or period of time associated with an event in the lifecycle of the resource 01-01-2026 Source A related resource from which the described resource is derived PLOS ONE;Volume;21;Issue;2026-05-05 00:00:00;Article No.;e0347748; Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1371/journal.pone.0347748" target="_blank" rel="noreferrer noopener">https://doi.org/10.1371/journal.pone.0347748</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105038253731?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105038253731?origin=resultslist</a> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Patel S.K., Department of Electronics and Communication Engineering, School of Engineering and Technology, GGV Bilaspur, Chhattisgarh, India; Barik R.K., Department of Electronics and Communication Engineering, School of Engineering and Technology, CHRIST University, Bangalore, India; Dewangan N.K., Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India; Koziel S., Engineering Optimization and Modeling Center, Reykjavik University, Reykjavik, Iceland, Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk, Poland Description An account of the resource This work presents a geometrically simple topology for developing an ultra-wideband directional coupler with improved coupling and directivity. A short-ended coupled-line structure is used to achieve an ultra-wideband, tightly coupled symmetric three-section coupler using the microstrip line technology. The proposed design demonstrates an explicit improvement of approximately 1.2 dB in coupling compared to conventional multi-section directional couplers. Calculated, simulated, and measured responses validate the effectiveness of the proposed configuration in terms of low-ripple coupling bandwidth, low insertion loss, and improved directivity performance compared to respective responses of the conventional structure. Couplers featuring a higher number of sections to implement different bandwidths and couplings can be fabricated using the presented structure due to its transmission line-based approach. A prototype of the three-section directional coupler with coupling of 7.6 dB, 8.1 dB, and 8.3 dB and corresponding bandwidths of 104%, 123% and 133% is designed, fabricated, and measured. The experimental results confirm that the coupler can reliably achieve higher coupling with ultra-wideband response from 0.75 GHz to 3.75 GHz (5:1) with 8.3 1.4 dB (ripple). Additionally, the design yields promising performance with return loss &gt; 16 dB, isolation &gt; 20 dB, a phase difference of 90 4, and directivity &gt; 30 dB, and the maximum circuit size is 0.067?02. This work aligns with SDG 9: Industry, Innovation and Infrastructure by advancing high-performance microwave components that support efficient, reliable, and scalable communication infrastructure. 2026 Patel et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Publisher An entity responsible for making the resource available Public Library of Science Relation A related resource ISSN: 19326203; CODEN: POLNC Language A language of the resource English Type The nature or genre of the resource Article Rights Information about rights held in and over the resource All Open Access; Gold Open Access; Green Open Access Format The file format, physical medium, or dimensions of the resource online