This study presents a unidirectional bowtie array antenna with incision gap for a digital video broadcasting‐T2 base station application. The antenna element consists of a bowtie radiator with incision gap on top of a square reflector. The element achieves a bandwidth of 82.35% for |S11| of <−10 dB, covering a frequency range of 450–1080 MHz. The antenna array comprises of four identical antenna elements mounted vertically to form an antenna array. The simulated and measured results of the antenna array show a good impedance matching for |S11| of <−10 dB along a frequency range of 450–1014 MHz (77.05%). The measured gains are 13.4–16.1 dBi along an operating frequency of 470–862 MHz with the narrow half‐power beamwidth in the vertical plane of ∼15° ± 5° and the half‐power beamwidth in the horizontal plane of ∼60° ± 5° for a frequency range of 470–666 MHz and 90.5° for 862 MHz. The radiation pattern is degraded at the frequency higher than 950 MHz.

This research presents a far-field (FF) antenna with near-field communication (NFC) capability for 3G/4G/LTE mobile devices. The integrated far-and near-field communication (FNFC) antenna was fabricated using conductive silver ink on polyethylene terephthalate (PET) flexible substrate. The FF segment of the antenna is operable in the frequency range of 1.8-2.1 GHz, and the NFC antenna is of dual loop and operable at 13.56 MHz. In the antenna realization, simulations were performed and, to validate, an antenna prototype was fabricated. The experimental results revealed that the FF antenna achieved an impedance bandwidth of 37% (1.52-2.21 GHz), given |S 11 | of less than −6 dB, with the minimum and maximum efficiency of 92.1% and 98%. The experimental gains are 1.76-2.08 dBi across the target operating frequency band, with near-omnidirectional radiation pattern. The simulation and experimental results are in good agreement. Moreover, the FNFC antenna achieves strong magnetic field distributions in H x , H y , and H z orientations and holds promising potential for 3G/4G/LTE applications.INDEX TERMS Conductive ink antenna, flexible substrate antenna, integrated antenna, mobile antenna.

This research presents a miniaturized wideband meander line antenna (MLA) using a magneto dielectric (MD) material for mobile device applications. The proposed MLA attached the lower and upper ground planes of the folder-type chassis, connected electrically by grounding strip. The MD material (ECCOSORB MF-124) was subsequently loaded onto the coupling element area of the MLA. The MD-laden MLA was ultracompact (10 mm × 25 mm × 1 mm), with the electrical size of 0.015λ × 0.039λ × 0.0015λ at 470 MHz. The surface current distribution was simulated to determine the optimal parameters of the MD-laden MLA. To verify, a prototype antenna was fabricated and the experiments were performed. The measured impedance bandwidth (S11<−6 dB) covered the frequency range of 467–1012 MHz (73.6%), with an omnidirectional radiation pattern. The radiation efficiency was in excess of 90%, rendering it suitable for the DVB-H/LTE13/GSM850/900 applications.

This paper presents an omnidirectional antenna using stacked curve dipoles radiating horizontal polarization for digital television (DTV) reception. The proposed antenna consists of stacked curve dipoles designed on brass sheet. The parametric study is carried out for various dimensions of curve dipoles to improve the impedance bandwidth. The results show good impedance matching forS11of less than −10 dB along the frequency range from 404 MHz to 871 MHz. The antenna gain is between −10 dBi and 0.67 dBi along the frequency range from 470 to 862 MHz.

This paper presents a horizontally polarized omnidirectional antenna using octagonal dipole array for digital television reception. The proposed antenna consists of stacked octagonal dipole array that is designed from brass sheet. The parametric study is carried out for different dimensions of distance between octagonal dipole, dipole arm and radiator to improve the impedance bandwidth. Obvious that the results show good impedance matching of |S 11 | better than 10 dB, and antenna gain of 1.1 dBi -2.3 dBi along the frequency range from 470 MHz to 862 MHz.