{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T15:25:41Z","timestamp":1774538741854,"version":"3.50.1"},"reference-count":29,"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","license":[{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"DOI":"10.13039\/501100002701","name":"Ministry of Education","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002701","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Research Management Centre (RMC), School of Postgraduate Studies"},{"DOI":"10.13039\/501100005417","name":"Universiti Teknologi Malaysia","doi-asserted-by":"publisher","award":["04G65"],"award-info":[{"award-number":["04G65"]}],"id":[{"id":"10.13039\/501100005417","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005417","name":"Universiti Teknologi Malaysia","doi-asserted-by":"publisher","award":["06G20"],"award-info":[{"award-number":["06G20"]}],"id":[{"id":"10.13039\/501100005417","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE Access"],"published-print":{"date-parts":[[2020]]},"DOI":"10.1109\/access.2020.2966125","type":"journal-article","created":{"date-parts":[[2020,1,14]],"date-time":"2020-01-14T22:44:56Z","timestamp":1579041896000},"page":"13573-13583","source":"Crossref","is-referenced-by-count":39,"title":["Compact Metamaterial Based $4\\times4$  Butler Matrix With Improved Bandwidth for 5G Applications"],"prefix":"10.1109","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4302-6150","authenticated-orcid":false,"given":"Arshad","family":"Karimbu Vallappil","sequence":"first","affiliation":[]},{"given":"Mohamad Kamal A.","family":"Rahim","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1537-5502","authenticated-orcid":false,"given":"Bilal A.","family":"Khawaja","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2237-6810","authenticated-orcid":false,"given":"Muhammad Naeem","family":"Iqbal","sequence":"additional","affiliation":[]}],"member":"263","reference":[{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1002\/mop.28972"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1109\/APS.2013.6711731"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1002\/mmce.21642"},{"key":"ref13","first-page":"4","article-title":"Design and implementation of a compact butler matrix using mitered bends","volume":"5","author":"mariadoss","year":"2006","journal-title":"Proc Asia&#x2013;Pacific Microw Conf Proc"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2017.2666810"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.11591\/ijece.v7i2.pp888-893"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1007\/s11277-017-4158-7"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1109\/LMWC.2014.2306898"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.2528\/PIERC14101802"},{"key":"ref19","year":"2018","journal-title":"Material Datasheet"},{"key":"ref28","doi-asserted-by":"publisher","DOI":"10.2528\/PIERL15101004"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1109\/COMST.2016.2532458"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.1155\/2019\/1645281"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2016.2569483"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1109\/MMM.2017.2664001"},{"key":"ref29","first-page":"1241","article-title":"Beam forming network using \n$4\\times4$\n narrowband butler matrix for tracking and localization applications","author":"priyadarshan","year":"2017","journal-title":"Proc Int Conf Intell Comput Control Syst (ICICCS)"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2019.2921522"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1109\/APCAP.2016.7843168"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1109\/APMC.2016.7931336"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2013.2260813"},{"key":"ref9","first-page":"1","article-title":"Design of a \n$4\\times4$\n butler matrix for beamforming antenna applications","author":"sfar","year":"2014","journal-title":"Proc 11th Medit Microw Symp (MMS)"},{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2014.2328098"},{"key":"ref20","author":"pozar","year":"2005","journal-title":"Microwave Engineering"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1002\/0471754323"},{"key":"ref21","author":"fooks","year":"1990","journal-title":"Microwave Engineering Using Microstrip Circuits"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1049\/el.2011.2135"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1002\/mmce.20377"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1002\/tee.22435"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1002\/2016RS006155"}],"container-title":["IEEE Access"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx7\/6287639\/8948470\/08957034.pdf?arnumber=8957034","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,1,27]],"date-time":"2022-01-27T18:54:22Z","timestamp":1643309662000},"score":1,"resource":{"primary":{"URL":"https:\/\/ieeexplore.ieee.org\/document\/8957034\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020]]},"references-count":29,"URL":"https:\/\/doi.org\/10.1109\/access.2020.2966125","relation":{},"ISSN":["2169-3536"],"issn-type":[{"value":"2169-3536","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020]]}}}