{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,26]],"date-time":"2026-05-26T09:06:20Z","timestamp":1779786380947,"version":"3.53.1"},"reference-count":24,"publisher":"World Scientific Pub Co Pte Ltd","issue":"15","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J CIRCUIT SYST COMP"],"published-print":{"date-parts":[[2026,9,15]]},"abstract":"<jats:p>\n                    This paper presents a compact, multiband, flexible metasurface (flexi-meta) antenna structure consisting of metasurface antenna elements designed exclusively for 5G sub-6 GHz applications. The proposed flexi-meta antenna is realized by first creating a double-negative (DNG) metamaterial unit cell on a flexible (0.4 mm thick) FR-4 substrate. Then, an array of these DNG unit cells is suitably placed inside the rectangular ring-slotted patch using the Theory of characteristic modes (TCM), to achieve optimal performance in the sub-6 GHz band. The resulting flexi-meta antenna is compact with an overall volume of 300 mm\n                    <jats:sup>3<\/jats:sup>\n                    ([Formula: see text]). It exhibits a wide bandwidth of 1100 MHz (3.15\u20134.25 GHz), a peak gain of 5.5 dBi, a return loss of [Formula: see text] dB, and a radiation efficiency of 85%. These characteristics distinguish the flexi-meta antenna as cost effective, compact, conformal, high-performance contender for 5G sub-6GHz and IoT applications.\n                  <\/jats:p>","DOI":"10.1142\/s0218126626501409","type":"journal-article","created":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T15:36:04Z","timestamp":1773416164000},"source":"Crossref","is-referenced-by-count":0,"title":["Double Negative Metasurface Wideband Antenna Design Using TCM-Based Optimization for 5G Sub-6 GHz Applications"],"prefix":"10.1142","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8032-4723","authenticated-orcid":false,"given":"Geetanjali","family":"Singla","sequence":"first","affiliation":[{"name":"Thapar Institute of Engineering and Technology, Patiala, Punjab, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4684-3156","authenticated-orcid":false,"given":"Rashbha","family":"Sharma","sequence":"additional","affiliation":[{"name":"Electronics Engineer at Schiebel Antriebstechnik, Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2331-1667","authenticated-orcid":false,"given":"Rajesh","family":"Khanna","sequence":"additional","affiliation":[{"name":"Thapar Institute of Engineering and Technology, Patiala, Punjab, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4567-2404","authenticated-orcid":false,"given":"Shaminder","family":"Kaur","sequence":"additional","affiliation":[{"name":"Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2434-5073","authenticated-orcid":false,"given":"Ashish","family":"Sachdeva","sequence":"additional","affiliation":[{"name":"Department of Electronics and Communication, Maharishi Markandeshwar Engineering College, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"219","published-online":{"date-parts":[[2026,3,13]]},"reference":[{"key":"S0218126626501409BIB001","doi-asserted-by":"publisher","DOI":"10.3390\/electronics12102200"},{"key":"S0218126626501409BIB002","first-page":"949","volume-title":"7th Int. 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