Design of reconfigurable and adjustable diplexer with very high isolation for both (L, S) bands applications based on pseudocombline structure

Design of reconfigurable and adjustable diplexer with very high isolation for both (L, S) bands applications based on pseudocombline structure | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Design of reconfigurable and adjustable diplexer with very high isolation for both (L, S) bands applications based on pseudocombline structure Yasir Alabedi, Seyed Vahab AL-Din Makki, Nasr Alkhafaji This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4351355/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 3 You are reading this latest preprint version Abstract In this paper, a 5-pole reconfigurable and tunable diplexer with high isolation based on a pseudo-combline structure is designed and simulated. The proposed diplexer has two BPFs for both channels that operate at specific bands S (2 GHz) and L (3.5 GHz). A new class of feed section is proposed to increase the matching level between BPFs to make them operate at the desired frequencies. Varactor diodes are used to obtain the tunability property for the proposed diplexer, where they can tune the two bands of the diplexer to different frequencies. Also, for reconfigurability, a pin diode can be used as a switch in the feed section between to BPFs. The proposed diplexer has a compact size (46.12*40.49) mm; the insertion loss of two channels is 0.86, 0.39 dB; and the return loss is 12.24, 18.47 dB. Finally, the proposed diplexer has the highest isolation between TX and RX ports (more than 69 dB), which is higher than other related works. band-pass filter diplexer microstrip Pseudo-combline BPF Coupled line Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editor assigned by journal 28 May, 2024 Submission checks completed at journal 28 May, 2024 First submitted to journal 30 Apr, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4351355","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":307779487,"identity":"5fae7a2b-3031-4566-946d-931fc258d652","order_by":0,"name":"Yasir Alabedi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABBklEQVRIie3Qv2vCQBTA8SeBTA+zntQf/ROuBCRF8G9JyNAl0DVg0UCg/0Op9M9wvhDILQHXEx0aOnRx6SId+zQgXZ6uhd6Xy/LuPlwSAJvtj6bo6YMAEGHaTsRpXSHYkro9epXAmXSez4RPat2UKUzRe80L07xN51I5xRYhGGQcqRNZ1BCj2FVxEK1iIZUbT+hSnyUqgSIDB8EkYxGtHCI4viESsWT9+U5kgSPzeBDRckHEO1wmJpRESpQmcelYebzFvUh6Zk9EarzbVX4QVrr3Urr+/VLy39JdP3x8ZelsONzmzeb7aeZ1dd6YfTpn/9itOr3e75HTTjocGXEbPLHZbLZ/1w+bAFbH9eoTxQAAAABJRU5ErkJggg==","orcid":"","institution":"Razi University","correspondingAuthor":true,"prefix":"","firstName":"Yasir","middleName":"","lastName":"Alabedi","suffix":""},{"id":307779488,"identity":"c24587b4-68d1-43a8-ad8b-27ce8dd0645f","order_by":1,"name":"Seyed Vahab AL-Din Makki","email":"","orcid":"","institution":"Razi University","correspondingAuthor":false,"prefix":"","firstName":"Seyed","middleName":"Vahab AL-Din","lastName":"Makki","suffix":""},{"id":307779489,"identity":"c79d2d38-d3de-4d49-afaf-1456c901431f","order_by":2,"name":"Nasr Alkhafaji","email":"","orcid":"","institution":"Engineering Technical College / Najaf","correspondingAuthor":false,"prefix":"","firstName":"Nasr","middleName":"","lastName":"Alkhafaji","suffix":""}],"badges":[],"createdAt":"2024-04-30 20:14:19","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4351355/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4351355/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":57584553,"identity":"b734d563-aa15-4d6e-b59c-5cd44e094819","added_by":"auto","created_at":"2024-06-03 02:48:22","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1220520,"visible":true,"origin":"","legend":"","description":"","filename":"diplexerpaper1G1.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4351355/v1_covered_7b91b638-dd0a-424a-8115-74802cb5302b.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Design of reconfigurable and adjustable diplexer with very high isolation for both (L, S) bands applications based on pseudocombline structure","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"journal-of-intelligent-information-systems","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"jiis","sideBox":"Learn more about [Journal of Intelligent Information Systems](http://link.springer.com/journal/10844)","snPcode":"10844","submissionUrl":"https://submission.nature.com/new-submission/10844/3","title":"Journal of Intelligent Information Systems","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"band-pass filter, diplexer, microstrip, Pseudo-combline BPF, Coupled line","lastPublishedDoi":"10.21203/rs.3.rs-4351355/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4351355/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this paper, a 5-pole reconfigurable and tunable diplexer with high isolation based on a pseudo-combline structure is designed and simulated. The proposed diplexer has two BPFs for both channels that operate at specific bands S (2 GHz) and L (3.5 GHz). A new class of feed section is proposed to increase the matching level between BPFs to make them operate at the desired frequencies. Varactor diodes are used to obtain the tunability property for the proposed diplexer, where they can tune the two bands of the diplexer to different frequencies. Also, for reconfigurability, a pin diode can be used as a switch in the feed section between to BPFs. The proposed diplexer has a compact size (46.12*40.49) mm; the insertion loss of two channels is 0.86, 0.39 dB; and the return loss is 12.24, 18.47 dB. Finally, the proposed diplexer has the highest isolation between TX and RX ports (more than 69 dB), which is higher than other related works.\u003c/p\u003e","manuscriptTitle":"Design of reconfigurable and adjustable diplexer with very high isolation for both (L, S) bands applications based on pseudocombline structure","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-06-03 02:40:14","doi":"10.21203/rs.3.rs-4351355/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"editorAssigned","content":"","date":"2024-05-28T14:19:41+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-05-28T07:35:15+00:00","index":"","fulltext":""},{"type":"submitted","content":"Journal of Intelligent Information Systems","date":"2024-04-30T20:12:15+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"journal-of-intelligent-information-systems","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"jiis","sideBox":"Learn more about [Journal of Intelligent Information Systems](http://link.springer.com/journal/10844)","snPcode":"10844","submissionUrl":"https://submission.nature.com/new-submission/10844/3","title":"Journal of Intelligent Information Systems","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"db5a5e5d-9134-45c9-b262-0034033dbe37","owner":[],"postedDate":"June 3rd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2024-06-07T12:11:20+00:00","versionOfRecord":[],"versionCreatedAt":"2024-06-03 02:40:14","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4351355","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4351355","identity":"rs-4351355","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}