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

Hussain, Niamat; Nguyen, Truong Khang; Han, Haewook

doi:10.1155/2016/5826957

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…Such designs suffer from complex geometries and non-planar structures. Lens-coupled antennas in which a dielectric lens is placed on radiator especially at highfrequencies to focus the radiated beam [11][12]. These antennas have the advantages of high gain and wideband characteristics but have low radiation efficiencies due to the losses in the thick dielectric material and bulky size.…”

Section: Introductionmentioning

confidence: 99%

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

et al. 2020

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This paper presents a metasurface-based single-layer low-profile circularly polarized (CP) antenna with the wideband operation and its multiple-input multiple-output (MIMO) configuration for fifth-generation (5G) communication systems. The antenna consists of a truncated corner patch and a metasurface (MS) of a 2 × 2 periodic square metallic plates. The distinguishing feature of this design is that all the radiating elements (radiator and MS) are printed on the single-layer of the dielectric substrate, which ensures the low-profile and low-cost features of the antenna while maintaining high gain and wideband characteristics. The wideband CP radiations are realized by exploiting surface-waves along the MS and its radiation mechanism is explained in detail. The single-layer antenna geometry has an overall compact size of 1.0λ0 × 1.0λ0 × 0.04λ0. Simulated and measured results show that the single-layer metasurface antenna has a wide 10 dB impedance bandwidth of 23.4 % (24.5-31 GHz) (23.4 %) and overlapping 3-dB axial ratio bandwidth of 16.8 % (25-29.6 GHz). The antenna also offers stable radiation patterns with a high radiation efficiency (>95%) and a flat gain of 11 dBic. Moreover, a 4-port (2 × 2) MIMO antenna is designed using the proposed design by placing each element perpendicular to each other. Without a dedicated decoupling structure, the MIMO antenna shows an excellent diversity performance in terms of isolation between antenna elements, envelope correlation coefficient, and channel capacity loss. Most importantly, the operational bandwidth of the antenna covers the millimeter-wave (mm-wave) band (25-29.5 GHz) assigned for 5G communication. These features of the proposed antenna system make it a suitable candidate for 5G smart devices and sensors.

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Section: Introductionmentioning

confidence: 99%

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

et al. 2020

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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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“…Graphene has many advantages in terahertz antenna applications, such as miniaturization, mechanical flexibility and dynamic adjustability [15,16]. Various designs of antennas structures were proposed that are based on with metasurface planar feeding structure [17], leaky-wave slit dipole structure [18], multiple patch cells structure [19], WBAN-THz structure [20], synthesized photonic bandgap substrate using BPSO [21] and On-chip catadioptric THz lens antenna [22].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Antenna for THz Wireless Communication

Saraereh¹,

Al-Tarawneh²,

Ali³

et al. 2022

Intelligent Automation &Amp; Soft Computing

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The frequency range of the terahertz (THz) band is usually defined as 0.3~3.0 THz, and some scholars have also extended it to 0.1~10 THz. THz technology has the characteristics of low photon radiation energy and rich spectrum information, and the THz band contains the vibration and rotation resonance frequencies of many material macromolecules, which can realize fingerprint detection. Therefore, THz technology has great academic value and a wide range of applications in basic research and applied science. Application prospects, such as THz spectroscopy technology provides a new means for studying the interaction between electromagnetic waves and matter, and its application in sensing has also penetrated into semiconductors, biology and medicine and health, homeland security, food quality control and environmental testing and other major fields. This paper proposes a novel patch antenna structure for the THz communication. The proposed antenna is designed on a polyimide substrate and graphene. The prominent feature of this antenna is that the radiation performance is does not deteriorates when tuning the frequency points. The frequency is controlled through a bias electrical field and not the conventional electronic switch. Theoretical analysis is performed for frequency-tuning and the equivalent circuit model is utilized to determine the input impedance. Simulation results show that the proposed THz antenna operates in the wideband THz with high gain and radiation efficiency.

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

Cited by 18 publications

References 23 publications

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

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

Design and Analysis of a Novel Antenna for THz Wireless Communication

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