A traveling-wave stripline dipole antenna on a substrate lens at terahertz frequency

Nguyen, Truong Khang; Rotermund, Fabıan

doi:10.1016/j.cap.2014.05.005

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…Fabry-Perot cavity antennas have also been proposed for THz radiation because of their promising properties of high gain, low complexity, and stability of fabrication, but these antennas undergo design challenges involving a low 3-dB gain bandwidth, particularly antennas with high-permittivity substrates [7][8][9][10]. The electrically thick substrates in the THz frequency cause serious problems, such as substrate reso-nance, which can be eliminated by decreasing the substrate thickness up to λ o /20, where λ o is a free space wavelength [11].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Planar Leaky-Wave Slit Antenna for Different Values of Substrate Thickness

Hussain

Kedze

2017

J Electromagn Eng Sci

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This paper presents the performance of a planar, low-profile, and wide-gain-bandwidth leaky-wave slit antenna in different thickness values of high-permittivity gallium arsenide substrates at terahertz frequencies. The proposed antenna designs consisted of a periodic array of 5 × 5 metallic square patches and a planar feeding structure. The patch array was printed on the top side of the substrate, and the feeding structure, which is an open-ended leaky-wave slot line, was etched on the bottom side of the substrate. The antenna performed as a Fabry-Perot cavity antenna at high thickness levels (H = 160 μm and H = 80 μm), thus exhibiting high gain but a narrow gain bandwidth. At low thickness levels (H = 40 μm and H = 20 μm), it performed as a metasurface antenna and showed wide-gain-bandwidth characteristics with a low gain value. Aside from the advantage of achieving useful characteristics for different antennas by just changing the substrate thickness, the proposed antenna design exhibited a low profile, easy integration into circuit boards, and excellent low-cost mass production suitability. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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Section: Introductionmentioning

confidence: 99%

Performance of a Planar Leaky-Wave Slit Antenna for Different Values of Substrate Thickness

Hussain

Kedze

2017

J Electromagn Eng Sci

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“…For example, an antenna with a five-feeding structure showed a gain of 15.5 dBi, a 3-dB gain bandwidth of 17.3%, and radiation efficiency of 73%. This antenna achieved a considerable size reduction in terms of device thickness in comparison to the design of a conventional lens-coupled antenna while achieving comparable gain [66]. The antenna design exhibits a low-profile, mechanical robustness, easy integration into circuit boards, and excellent low-cost mass production suitability in addition to its high-gain and widegain bandwidth characteristics.…”

Section: Metasurface Antenna At Terahertz Frequencymentioning

confidence: 99%

Application of metasurfaces in the design of performance-enhanced low-profile antennas

Park

2018

EPJ Appl. Metamat.

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This paper presents a review of metasurface-based antennas conducted at the Microwave Communication Laboratory (MCL) of Ajou University in the Republic of Korea. In this paper, profile miniaturization, bandwidth enhancement, multiband operation, and radiation pattern control of metasurface-based antennas are considered. The paper first presents metasurface-based antennas implemented by placing various radiators on top of the metasurface. It then presents antennas implemented by placing the radiators below the metasurface with and without the ground plane. Metasurface-based antennas are not only able to achieve high efficiency with a low profile but they are also able to generate extra resonances from the metasurface structures, which significantly enhances the overall performance of the antennas. These additional resonances were utilized in multiband and/or wideband operations. In addition, the design of a planar compact wide-gain-bandwidth metasurface-based antenna and its radiation characteristics are presented at a terahertz (THz) frequency range. The THz antennas were designed with metasurfaces and a planar leaky-wave feeding structure. Finally, the outlook on future research at the MCL for antenna-related work and their applications using metasurfaces is provided.

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“…In particular, many researchers focused on the coupling of leaky-wave antennas with lenses due to their important and attractive properties, for instance, their broad impedance bandwidth, high directivity, and simple feeding network [12]. Various leaky dielectric lens antennas fed by a stripline dipole [13], typical leaky-wave slot [14], leaky-wave waveguide [15], and an array of leaky-wave slots [16] have been studied thoroughly in the literature. However, there is no detailed study of a lens with different sizes for slit dipole antenna to determine the optimal minimum lens size for miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Minimum Lens Size Supporting the Leaky-Wave Nature of Slit Dipole Antenna at Terahertz Frequency

Hussain

Nguyen

Han

2016

International Journal of Antennas and Propagation

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We designed a slit dipole antenna backed by an extended hemispherical silicon lens and investigated the minimum lens size in which the slit dipole antenna works as a leaky-wave antenna. The slit dipole antenna consists of a planar feeding structure, which is a center-fed and open-ended slot line. A slit dipole antenna backed by an extended hemispherical silicon lens is investigated over a frequency range from 0.2 to 0.4 THz with the center frequency at 0.3 THz. The numerical results show that the antenna gain responses exhibited an increased level of sensitivity to the lens size and increased linearly with increasing lens radius. The lens with the radius of 1.2λois found to be the best possible minimum lens size for a slit dipole antenna on an extended hemispherical silicon lens.

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A traveling-wave stripline dipole antenna on a substrate lens at terahertz frequency

Cited by 10 publications

References 25 publications

Performance of a Planar Leaky-Wave Slit Antenna for Different Values of Substrate Thickness

Performance of a Planar Leaky-Wave Slit Antenna for Different Values of Substrate Thickness

Application of metasurfaces in the design of performance-enhanced low-profile antennas

Minimum Lens Size Supporting the Leaky-Wave Nature of Slit Dipole Antenna at Terahertz Frequency

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