{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T14:10:03Z","timestamp":1737382203885,"version":"3.33.0"},"reference-count":64,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2020,9,14]],"date-time":"2020-09-14T00:00:00Z","timestamp":1600041600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Institute of Information & communications Technology Planning & Evaluation","award":["No.2019-0-00138","No. 2017-0-00795"]},{"DOI":"10.13039\/501100002460","name":"Chung-Ang University","doi-asserted-by":"publisher","award":["Research Scholarship Grants in 2019"],"id":[{"id":"10.13039\/501100002460","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"This article presents a dual-polarized, high gain multi-beam and high T\/Rx channel-to-channel isolation antenna module for 24 GHz sensor applications. The proposed antenna is configured to support 2-Tx and 2-Rx channels with a pair of vertically polarized (VP) radiation pattern and a pair of horizontally polarized (HP) radiation pattern. Further, each linearly polarized T\/Rx antenna is configured by 2 \u00d7 4 array with a multi-layer integrated feed network, resulting in four sets of 2 \u00d7 4 array antennas fabricated within a single printed circuit board (PCB). Since multiple RF channels must be ensured with minimal interference, high antenna-to-antenna, including Tx-to-Tx, Rx-to-Rx, and Tx-to-Rx port isolations in the proposed antenna are achieved by multi-layered feed network and four sets of T-shaped magnetic walls. To verify the performance of the proposed structure, a 2-Tx and 2-Rx antenna module was fabricated at 24 GHz. The fabricated antenna showed a measured maximum 10-dB impedance bandwidth of 3.9% with a maximum measured gain of 11.7 dBi, considering both Tx and Rx. Further, the measured channel-to-channel isolations were always better than 35.6 dB at 24 GHz.<\/jats:p>","DOI":"10.3390\/s20185233","type":"journal-article","created":{"date-parts":[[2020,9,14]],"date-time":"2020-09-14T13:04:53Z","timestamp":1600088693000},"page":"5233","source":"Crossref","is-referenced-by-count":4,"title":["Dual-Polarized Multi-Channel 24 GHz Radar Sensor Antenna for High Channel-to-Channel Isolation"],"prefix":"10.3390","volume":"20","author":[{"given":"Young-Jun","family":"Kim","sequence":"first","affiliation":[{"name":"School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea"}]},{"given":"Gunhark","family":"Noh","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3780-5382","authenticated-orcid":false,"given":"Han Lim","family":"Lee","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea"}]},{"given":"Sungwook","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2020,9,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Yang, B., and Zhang, J. 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