{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T00:50:25Z","timestamp":1760230225361,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2022,7,17]],"date-time":"2022-07-17T00:00:00Z","timestamp":1658016000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation","award":["RGNS 63-103","2564-02-01-006"],"award-info":[{"award-number":["RGNS 63-103","2564-02-01-006"]}]},{"name":"King Mongkut\u2019s Institute of Technology Ladkrabang","award":["RGNS 63-103","2564-02-01-006"],"award-info":[{"award-number":["RGNS 63-103","2564-02-01-006"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This research proposed a portable wideband horizontally-polarized directional antenna scheme with a radome for digital terrestrial television reception. The operating frequency band of the proposed antenna scheme is 470\u2013890 MHz. The portable antenna scheme was an adaptation of the Yagi-Uda antenna, consisting of a folded bowtie radiator, a semicircular corrugated reflector, and a V-shaped director. Simulations were carried out, and an antenna prototype was fabricated. To validate, experiments were undertaken to assess the antenna performance, including the impedance bandwidth (|S11| \u2264 \u221210 dB), gain, and unidirectionality. The measured impedance bandwidth was 75.93%, covering 424\u2013943 MHz, with a measured antenna gain of 2.69\u20134.84 dBi. The radiation pattern was of unidirectionality for the entire operating frequency band. The measured xz- and yz-plane half-power beamwidths were 150\u00b0, 159\u00b0, 160\u00b0 and 102\u00b0, 78\u00b0, 102\u00b0 at 470, 680, and 890 MHz, with the corresponding cross-polarization below \u221220 dB and \u221240 dB. The radome had a negligible impact on the impedance bandwidth, gain, and radiation pattern. The power obtained for the outdoor test, at 514 MHz, was 38.4 dB\u00b5V (\u221270.4 dBm) with a carrier-to-noise ratio (C\/N) of 11.6 dB. In addition, the power obtained for the indoor test was 26.6 dB\u00b5V (\u221282.2 dBm) with a C\/N of 10.9 dB. The novelty of this research lies in the concurrent use of the Yagi-Uda and bowtie antenna technologies to improve the impedance bandwidth and directionality of the antenna for digital terrestrial television reception.<\/jats:p>","DOI":"10.3390\/s22145338","type":"journal-article","created":{"date-parts":[[2022,7,18]],"date-time":"2022-07-18T01:53:22Z","timestamp":1658109202000},"page":"5338","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Portable Wideband Directional Antenna Scheme with Semicircular Corrugated Reflector for Digital Television Reception"],"prefix":"10.3390","volume":"22","author":[{"given":"Bancha","family":"Luadang","sequence":"first","affiliation":[{"name":"Faculty of Engineering, Rajamangala University of Technology Rattanakosin, Nakhon Pathom 73170, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rerkchai","family":"Pukraksa","sequence":"additional","affiliation":[{"name":"School of Engineering, King Mongkut\u2019s Institute of Technology Ladkrabang, Bangkok 10520, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pisit","family":"Janpangngern","sequence":"additional","affiliation":[{"name":"School of Engineering, King Mongkut\u2019s Institute of Technology Ladkrabang, Bangkok 10520, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3975-8578","authenticated-orcid":false,"given":"Khanet","family":"Pookkapund","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, Phranakhon Si Ayutthaya Rajabhat University, Phranakhon Si Ayutthaya 13000, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sitthichai","family":"Dentri","sequence":"additional","affiliation":[{"name":"College of Industrial Technology, King Mongkut\u2019s University of Technology North Bangkok, Bangkok 10800, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sompol","family":"Kosulvit","sequence":"additional","affiliation":[{"name":"School of Engineering, King Mongkut\u2019s Institute of Technology Ladkrabang, Bangkok 10520, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2057-3127","authenticated-orcid":false,"given":"Chuwong","family":"Phongcharoenpanich","sequence":"additional","affiliation":[{"name":"School of Engineering, King Mongkut\u2019s Institute of Technology Ladkrabang, Bangkok 10520, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4826","DOI":"10.1109\/TAP.2011.2165488","article-title":"CPW-fed wideband printed dipole antenna for digital TV applications","volume":"59","author":"Chen","year":"2011","journal-title":"IEEE Trans. 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