{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:48:09Z","timestamp":1760240889730,"version":"build-2065373602"},"reference-count":26,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2019,10,11]],"date-time":"2019-10-11T00:00:00Z","timestamp":1570752000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"HANWHA SYSTEMS","award":["HANWHA SYSTEMS"],"award-info":[{"award-number":["HANWHA SYSTEMS"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents a low-profile log-periodic meandered dipole array (LPMDA) antenna with wideband and high gain characteristics. The antenna consists of 14 dipole elements. For compactness, a meander line structure is applied to each dipole element to reduce its physical length. As a result, a compact and wideband LPMDA antenna is realized, exhibiting a wide impedance bandwidth of 1.04\u20135.22 GHz (ratio bandwidth of 5.02:1) for |   S 11| &lt; \u221210 dB. To enhance the antenna gain performance while maintaining the wideband behavior, the LPMDA antenna is integrated with a new design of an artificial magnetic conductor (AMC) structure. The designed AMC is realized by combining three AMC structures of different sizes to form a cascaded multi-section AMC structure, of which its overall operating bandwidth can continuously cover the entire impedance bandwidth of the LPMDA antenna. The proposed AMC-backed LPMDA antenna is experimentally verified and its measured \u221210 dB reflection bandwidth is found to be in the range of 0.84\u20135.15 GHz (6.13:1). At the main beam direction within the operating frequency bandwidth, the gain of the proposed AMC-backed LPMDA antenna ranges from 7.15\u201311.43 dBi, which is approximately 4 dBi higher than that of an LPMDA antenna without an AMC. Moreover, the proposed antenna has a low profile of only 0.138    \u03bb L. (   \u03bb L     is the free-space wavelength at the lowest operating frequency).<\/jats:p>","DOI":"10.3390\/s19204404","type":"journal-article","created":{"date-parts":[[2019,10,11]],"date-time":"2019-10-11T10:53:03Z","timestamp":1570791183000},"page":"4404","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["A Low-Profile High-Gain and Wideband Log-Periodic Meandered Dipole Array Antenna with a Cascaded Multi-Section Artificial Magnetic Conductor Structure"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5866-5302","authenticated-orcid":false,"given":"Son","family":"Trinh-Van","sequence":"first","affiliation":[{"name":"Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Korea"}]},{"given":"Oh Heon","family":"Kwon","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Korea"}]},{"given":"Euntae","family":"Jung","sequence":"additional","affiliation":[{"name":"Tactical Communication Team, Hanwha Systems, Seongnam 13524, Korea"}]},{"given":"Jinwoo","family":"Park","sequence":"additional","affiliation":[{"name":"Tactical Communication Team, Hanwha Systems, Seongnam 13524, Korea"}]},{"given":"Byunggil","family":"Yu","sequence":"additional","affiliation":[{"name":"Tactical Communication Team, Hanwha Systems, Seongnam 13524, Korea"}]},{"given":"Kichul","family":"Kim","sequence":"additional","affiliation":[{"name":"2nd R&amp;D Institute \u2212 1st Directorate, Agency for Defense Development, Daejeon 34186, Korea"}]},{"given":"Jongwoo","family":"Seo","sequence":"additional","affiliation":[{"name":"2nd R&amp;D Institute \u2212 1st Directorate, Agency for Defense Development, Daejeon 34186, Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8074-1137","authenticated-orcid":false,"given":"Keum Cheol","family":"Hwang","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2019,10,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Kim, S.-W., Noh, S.-K., Yu, H.-G., and Choi, D.-Y. 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