Design of terahertz photoconductive antenna arrays based on defective photonic crystal substrates

Rahmati, Ehsan; Ahmadi-Boroujeni, Mehdi

doi:10.1016/j.optlastec.2019.01.044

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…There are many PCA antennas and antenna arrays available in the literature. 138,139 The PCA antenna array was designed on low temperature (LT)-GaAs (ϵ r = 12.9, h = 59 μm, and tanδ = 0.006). The radiating and ground were designed on Ti-Au (h = 0.35 μm).…”

Section: Pca Arraysmentioning

confidence: 99%

See 1 more Smart Citation

THz antennas design, developments, challenges, and applications: A review

Pant¹,

Malviya²

2023

Int J Communication

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Terahertz (0.1-10 THz) wireless communication will be the future technology to reach a top-notch data rate. THz is one of the most promising candidates for 6G systems because it provides enormous bandwidth, up to 100 GHz, and a massive data rate of up to 1 Tbps. THz antennas, antenna arrays, and MIMO antenna arrays in 6G are hot research topics for implementing 6G wireless communication systems. The 6G aims to continue to enhance the features of the 5G as it is capable of achieving the maximum high-speed data rate, excellent reliable communication, massive connectivity, and very low latency connectivity. The 6G requirements need high-gain antenna arrays and MIMO antenna arrays to combat the effect of atmospheric losses in high frequencies. An in-depth discussion of the planar THz antennas that have been extensively used in THz applications like imaging, sensing, and Internet-of-Things (IoT) has been conducted. The study of the THz antennas, antenna arrays, and MIMO antennas on different conducting materials such as copper and graphene, which are designed on different dielectric substrates such as polyimide, quartz, liquid crystalline polymer, and polytetrafluoroethylene, has been carried out in detail. Metamaterial, photoconductive, plasmonic antennas, and THz beamforming are significant parts of THz communications. This paper also provides antennas and antenna arrays based on them.

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Section: Pca Arraysmentioning

confidence: 99%

“…Therefore, the requirement for PCA arrays is highly needed. There are many PCA antennas and antenna arrays available in the literature 138,139 …”

Section: Thz Antenna Arrays: Single Port and Multiple Radiating Elementsmentioning

confidence: 99%

THz antennas design, developments, challenges, and applications: A review

Pant¹,

Malviya²

2023

Int J Communication

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“…A special frequency band ranging from 100 to 10k Gigahertz termed as the Terahertz band is considered to be essential in answering the increasing data rate demand [2]. Several kinds of research have been done tremendously for implementing microstrip antenna in optical frequency bands in the last few years [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Optical antennas have been implemented in various applications like single band operation [1], triple band [2], wide band [3]- [4], multiband application [5] as well as WBAN [7]- [8], Bio-sensing [11], dual polarization [12] etc.…”

Section: Introductionmentioning

confidence: 99%

“…Likewise, the low plasma frequency, high electron mobility and the field-effect of graphene make it a relevant element for producing high frequency nanoelectronic devices [9]- [12]. Band gap structure categorized in optical and electrical studies have been used to design for reducing path loss and improving antenna parameters [13]- [16]. Miniaturization is the inherent requirement for terahertz range devices and fractal antennas suit the circumstances.…”

Section: Introductionmentioning

confidence: 99%

A triband EBG loaded microstrip fractal antenna for THz application

et al. 2023

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Future wireless communication needs antenna with multifunctional operation. This paper focuses on Terahertz Antenna that could be easily integrated with micro and nano devices. In this paper, an octagonal shaped Microstrip Fractal Antenna loaded with the EBG structure is designed for tri-band terahertz application. Triple band characteristic achieved by fractal radiating patch is loaded with Electronic Band Gap (EBG). The antenna features with total size of 700x900 µm 2 and resonates on three bands at 0.948 THz, 0.984 THz and, 1.040 THz. The result and performance indicates that the recommended antenna will be suitable for compact wireless devices and Monolithic Microwave Integrated Circuit (MMIC). All simulation work has been completed using electromagnetic software Ansoft High Frequency Structure Simulator (HFSS) and CST studio suite. The electromagnetic features like S11 parameters, VSWR, gain, efficiency and the radiation characteristics of suggested antenna are also examined. The simulation results show that this antenna has 9 dB realized gain at 0.948 THz resonating frequency.

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“…The geometrical structure of antenna can be optimized to obtain high-power and broadband terahertz radiation to improve the performance of such antennas [16]. Numerous structures of photoconductive antennas have been proposed, which were based on the incorporation of optical nano antennas [17], fractal geometries [18], gammadion-type structure [19], tapered helix monopole [20], hexagonal nano-antenna [21], interdigitated metallic dipole nanoantenna [22]- [24], 3D plasmon contact electrodes [25], nano-structured electrodes [26], thin-film plasma electrode [27], rectangular metal dipole nanoantenna [28], bow-tie metallic dipole nanoantenna [28], plasmon contact electrodes [29], [30], SRR-loaded antennas [31], and arrays of bowtie and four-leaf-clover-shaped antennas [32]. Further, several numerical models have been proposed for understanding the dynamics of these photoconductive antennas, such as full-wave numerical technique based on Maxwell and hydrodynamic transport equations [33], semiconductor carrier transport and migration models [22], [34], time-domain numerical modeling [35], numerical solution of induced current based on Monte Carlo simulation [36], finite element method [27], [37], and three-dimensional full-wave model [38].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Structural Parameters of Split-Ring Resonators on the Terahertz Radiation Characteristics of Micro-Structured Photoconductive Antennas: A Simulation Study

Xiong

et al. 2020

IEEE Photonics J.

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In this study, we have theoretically designed a micro-structured photoconductive antenna based on the combination of split-ring resonator (SRR) and dipole photoconductive antenna. Further, we have used numerical simulations to prove that the proposed antenna can enhance the terahertz radiation characteristics. According to the equivalent circuit model analysis, the terahertz radiation power and the resonance frequency of this antenna were found to be closely related with the structural parameters of the SRR. A numerical model was established to simulate the effect of the structural parameters of SRR on the terahertz radiation characteristics of the proposed antenna. The results indicated that an increase in the width and length of SRR caused an increase in the peak power intensity and a decrease in the resonance frequency. Moreover, as the gap width of SRR was increased, the peak power intensity was decreased and the resonance frequency was increased. Furthermore, the terahertz radiation power increased with increase in the gap width of antennas. Overall, we show that high-power terahertz radiation sources with specific frequency can be obtained by optimizing the structural parameters of SRR, and such sources are potentially useful in a variety of fields such as biomedicine, material analysis, and detection systems.

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Design of terahertz photoconductive antenna arrays based on defective photonic crystal substrates

Cited by 9 publications

References 25 publications

THz antennas design, developments, challenges, and applications: A review

THz antennas design, developments, challenges, and applications: A review

A triband EBG loaded microstrip fractal antenna for THz application

The Impact of Structural Parameters of Split-Ring Resonators on the Terahertz Radiation Characteristics of Micro-Structured Photoconductive Antennas: A Simulation Study

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