Portable Wideband Directional Antenna Scheme with Semicircular Corrugated Reflector for Digital Television Reception

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dc.contributor.authorLuadang, Bancha
dc.contributor.authorPukraksa, Rerkchai
dc.contributor.authorJanpangngern, Pisit
dc.contributor.authorPookkapund, Khanet
dc.contributor.authorDentri, Sitthichai
dc.contributor.authorKosulvit, Sompol
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.date.accessioned2026-08-06T10:37:19Z
dc.date.available2026-08-06T10:37:19Z
dc.date.issued2022-07-01
dc.description.abstractThis 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 470–890 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 (|S<inf>11</inf>| ≤ −10 dB), gain, and unidirectionality. The measured impedance bandwidth was 75.93%, covering 424–943 MHz, with a measured antenna gain of 2.69–4.84 dBi. The radiation pattern was of unidirectionality for the entire operating frequency band. The measured xz- and yz-plane half-power beamwidths were 150°, 159°, 160° and 102°, 78°, 102° at 470, 680, and 890 MHz, with the corresponding cross-polarization below −20 dB and −40 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 dBµV (−70.4 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 dBµV (−82.2 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.
dc.identifier.citationSensors, 22(14), 2022
dc.identifier.doi10.3390/s22145338
dc.identifier.issn14248220
dc.identifier.other2-s2.0-85135119866
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/13308
dc.sourceSensors
dc.subjectcorrugated reflector
dc.subjectdigital television
dc.subjectportable antenna
dc.subjectradome
dc.subjectwideband antenna
dc.titlePortable Wideband Directional Antenna Scheme with Semicircular Corrugated Reflector for Digital Television Reception
dc.typeArticle

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