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Through a T-junction combiner, the proposed diplexer is accomplished by combining two OLR\u2014based band-pass filters tuned at two distinct frequencies. The system is implemented on a Rogers TMM4 substrate with a loss tangent of 0.002, a dielectric constant of 4.7, and a thickness of 1.52\u00a0mm. The suggested full duplex has dimensions of (90\u2009\u00d7\u200970) mm<jats:sup>2<\/jats:sup>. It achieves a modest frequency space ratio of<jats:italic>R<\/jats:italic>\u2009=\u20090.1646 in both transmit and receive modes by having two resonance frequencies of<jats:inline-formula><jats:alternatives><jats:tex-math>$${f}_{t}$$<\/jats:tex-math><mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:msub><mml:mi>f<\/mml:mi><mml:mi>t<\/mml:mi><\/mml:msub><\/mml:math><\/jats:alternatives><\/jats:inline-formula>= 2.191\u00a0GHz and<jats:inline-formula><jats:alternatives><jats:tex-math>$${f}_{r}$$<\/jats:tex-math><mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:msub><mml:mi>f<\/mml:mi><mml:mi>r<\/mml:mi><\/mml:msub><\/mml:math><\/jats:alternatives><\/jats:inline-formula>= 2.584\u00a0GHz, respectively. The simulated structure displays good insertion losses (IL) of approximately 1.2\u00a0dB and 1.79\u00a0dB for the two channels, respectively, at fractional bandwidths of 1.24% at 2.191\u00a0GHz and 0.636% at 2.584\u00a0GHz. The simulated isolation values for 2.191\u00a0GHz and 2.584\u00a0GHz are 53.3\u00a0dB and 66.5\u00a0dB, respectively.<\/jats:p>","DOI":"10.1186\/s13638-023-02330-8","type":"journal-article","created":{"date-parts":[[2024,1,4]],"date-time":"2024-01-04T15:05:48Z","timestamp":1704380748000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Implementation of highly isolation OLR: based microstrip full-duplex Tx\/Rx antenna systems with low insertion loss for contemporary wireless system applications"],"prefix":"10.1186","volume":"2024","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4468-0277","authenticated-orcid":false,"given":"Rania H.","family":"Elabd","sequence":"first","affiliation":[]},{"given":"Amr H.","family":"Hussein","sequence":"additional","affiliation":[]},{"given":"Marwa E.","family":"Mousa","sequence":"additional","affiliation":[]},{"given":"Ahmed","family":"A.Kabeel","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2024,1,4]]},"reference":[{"key":"2330_CR1","doi-asserted-by":"publisher","DOI":"10.1186\/s13638-022-02127-1","author":"Z Jiayu","year":"2022","unstructured":"Z. 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