Modeling of an ultra-wideband GHz range antenna with recursive topology

For decades the development of telecommunications devices shows an inspiring progress. Nowadays, a wide range of multifunctional wireless telecommunications devices with small weight and size characteristics is being developed, since these are portable devices. One of the most important elements of such a device is the antenna. The antenna has a number of conflicting requirements: a wide frequency band, compact size, simple manufacturing technology, low price, the ability to work in several frequency bands, etc. One of the promising types of ultra-wideband antennas with a high gain is fractal antennas with a recursive topological pattern.

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Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

Applied Sciences ◽

10.3390/app10072429 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2429 ◽

Cited By ~ 1

Author(s):

Li Hui Dai ◽

Chong Tan ◽

Yong Jin Zhou

Keyword(s):

Radiation Pattern ◽

Frequency Band ◽

High Gain ◽

Base Station ◽

Ultra Wideband ◽

Radiation Patterns ◽

Low Profile ◽

Simulation Results ◽

Vivaldi Antenna ◽

Good Agreement

Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.

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Performance Enhancement of Microstrip UWB Patch Antenna with SRR for Wireless Body Area Networks

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a1025.1191s19 ◽

2019 ◽

Vol 9 (1S) ◽

pp. 112-115

Keyword(s):

Patch Antenna ◽

Performance Enhancement ◽

Large Data ◽

Wide Band ◽

High Gain ◽

Split Ring Resonator ◽

Ultra Wideband ◽

High Frequency Structure Simulator ◽

Power Spectral ◽

Wide Range

This paper presents a square shape Split Ring Resonator (SRR) loaded with micro strip patch antenna operating in UWB (Ultra Wide Band) range (3.1GHz -10.6GHz) for Bio-medical applications. The Ultra-Wideband is a wireless technology which is used to send large data over a wide range of frequencies by using very narrow pulses at low PSD (Power Spectral Density). UWB provides wireless transmission of audio, video and data with wide bandwidth. The proposed antenna specifically operates at 4.1GHz and is designed on a 23.19mm x 23.19mm x 1.35mm board of Arlon AD1000 substrate. This SRR antenna has been simulated using High-Frequency Structure Simulator (HFSS) software. The results show enhanced performance in terms of high gain, return loss (<10dB), Voltage Standing Wave Ratio (VSWR)<2, low Specific Absorption Rate (SAR), high Directivity, high radiation Efficiency.

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Design of Ultra-wideband Dielectric Resonator Antenna

WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL ◽

10.37394/23203.2021.16.16 ◽

2021 ◽

Vol 16 ◽

pp. 194-197

Author(s):

Guan-Pu Pan ◽

Jiun-Da Lin ◽

Tsung-lin Li ◽

Jwo-Shiun Sun

Keyword(s):

Dielectric Resonator ◽

High Gain ◽

Hybrid Structure ◽

Ultra Wideband ◽

Impedance Bandwidth ◽

Dielectric Resonator Antenna ◽

Antenna Structure ◽

Compact Size ◽

New Material ◽

Low Permittivity

In this paper, the new dielectric resonator antenna (DRA) is implemented by replacing the traditional dielectric resonator with a new material with low permittivity for ultra-wideband (UWB) application is presented and studied. A hybrid structure DRA was designed with parasitic slot to enhance the impedance bandwidth. The bandwidth met the specification of MB-OFDM for the bandwidth (3.168 GHz - 4.752 GHz). Finally, another antenna structure was designed. By applying the microstrip feed line, UWB and radiation characteristics are achieved. From the measured results, the proposed DRA showed good radiation pattern, high gain, wide bandwidth (3.03 GHz -10.7 GHz) and compact size. The bandwidth met the specification of MB-OFDM (3.168 GHz -10.56 GHz).

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Optically controlled UWB antenna using photonic crystal waveguides

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078717000241 ◽

2017 ◽

Vol 9 (8) ◽

pp. 1661-1666 ◽

Cited By ~ 1

Author(s):

Heba Zakaria ◽

Moataza Hindy ◽

Adel El-Henawi

Keyword(s):

Photonic Crystal ◽

Frequency Band ◽

Satellite Communication ◽

High Efficiency ◽

Incident Light ◽

High Gain ◽

Optical Switches ◽

Ultra Wideband ◽

Ratio Requirement ◽

Optical Router

This paper presents a new optically controlled reconfigurable ultra-wideband antenna using reconfigurable optical router with photonic crystal substrate. The proposed antenna has three optical switches. The optical switches are made by placing silicon wafers over three slots etched on the resonator. The coplanar fed microstrip antenna can work at eight modes using optically controlled switches. This design proposes triple narrow notched bands at center frequencies 3.5 GHz “WiMAX”, 5.5 GHz “WLAN” and 8.4 GHz “X-band satellite communication”. The proposed antenna satisfies the voltage standing wave ratio requirement of <2 in the frequency band between 2.6 and 11.8 GHz except for the three rejected bands. According to the incident light, the physical properties of these switches can be changed from an insulator state (OFF state) to a near-conducting state (ON state). The incident light is coupled to the optical switches using a reconfigurable optical router. The proposed antenna provides high gain, and high efficiency all over the frequency band excluding the rejected bands.

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Enhancing Gain for UWB Antennas Using FSS: A Systematic Review

Mathematics ◽

10.3390/math9243301 ◽

2021 ◽

Vol 9 (24) ◽

pp. 3301

Author(s):

Ahmed Jamal Abdullah Al-Gburi ◽

Imran Mohd Ibrahim ◽

Zahriladha Zakaria ◽

Muhannad Kaml Abdulhameed ◽

Tale Saeidi

Keyword(s):

Systematic Review ◽

Frequency Selective Surface ◽

High Gain ◽

Ultra Wideband ◽

Antenna Gain ◽

Uwb Antennas ◽

Gain Enhancement ◽

Directional Radiation ◽

Wide Range ◽

Uwb Applications

This review paper combs through reports that have enhanced antenna gain for ultra-wideband (UWB) frequencies using frequency-selective surface (FSS) techniques. The FSS techniques found across the research landscape were mapped onto a taxonomy in order to determine the most effective method for improving antenna gain. Additionally, this study looked into the motivation behind using FSS as a reflector in UWB frequencies to obtain directional radiation. The FSS suits multiple applications due to its exceptional ability to minimize power loss in undesired transmission areas in the antenna, as well as to hinder the interference that may occur from undesirable and wasted radiation. An efficient way to obtain constant gain over a wide range of frequencies is also elaborated in this paper. Essentially, this paper offers viable prescription to enhance antenna gain for UWB applications. Methods: A comprehensive study was performed using several imminent keywords, such as “high gain using FSS”, “gain enhancement using FSS”, “high gain UWB antennas”, and “gain enhancement of UWB antennas”, in different modifications to retrieve all related articles from three primary engines: Web of Science (WoS), IEEE Xplore, and Science Direct. Results: The 41 papers identified after a comprehensive literature review were classified into two categories. The FSS single- and multi-layer reflectors were reported in 25 and 16 papers, respectively. New direction: An effective method is proposed for FSS miniaturization and for obtaining constant gain over UWB frequencies while maintaining the return loss at −10 dB. Conclusion: The use of FSS is indeed effective and viable for gain enhancement in UWB antennas. This systematic review unravels a vast range of opportunities for researchers to bridge the identified gaps.

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Recent trends in smartphone-based detection for biomedical applications: a review

Analytical and Bioanalytical Chemistry ◽

10.1007/s00216-021-03184-z ◽

2021 ◽

Vol 413 (9) ◽

pp. 2389-2406 ◽

Cited By ~ 1

Author(s):

Soumyabrata Banik ◽

Sindhoora Kaniyala Melanthota ◽

Arbaaz ◽

Joel Markus Vaz ◽

Vishak Madhwaraj Kadambalithaya ◽

...

Keyword(s):

Biomedical Applications ◽

Histopathological Examination ◽

Dark Field ◽

Portable Devices ◽

Food Technology ◽

Wide Range ◽

Technological Interventions ◽

Recent Trends ◽

Increasing Demand

AbstractSmartphone-based imaging devices (SIDs) have shown to be versatile and have a wide range of biomedical applications. With the increasing demand for high-quality medical services, technological interventions such as portable devices that can be used in remote and resource-less conditions and have an impact on quantity and quality of care. Additionally, smartphone-based devices have shown their application in the field of teleimaging, food technology, education, etc. Depending on the application and imaging capability required, the optical arrangement of the SID varies which enables them to be used in multiple setups like bright-field, fluorescence, dark-field, and multiple arrays with certain changes in their optics and illumination. This comprehensive review discusses the numerous applications and development of SIDs towards histopathological examination, detection of bacteria and viruses, food technology, and routine diagnosis. Smartphone-based devices are complemented with deep learning methods to further increase the efficiency of the devices.

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Suppressing meta-holographic artifacts by laser coherence tuning

Light Science & Applications ◽

10.1038/s41377-021-00547-0 ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Yaniv Eliezer ◽

Geyang Qu ◽

Wenhong Yang ◽

Yujie Wang ◽

Hasan Yılmaz ◽

...

Keyword(s):

Spatial Coherence ◽

Fine Tuning ◽

Total Power ◽

Image Sharpness ◽

Continuous Tuning ◽

Fine Spatial Resolution ◽

Compact Size ◽

Wide Range ◽

Fabrication Defects ◽

Holographic Displays

AbstractA metasurface hologram combines fine spatial resolution and large viewing angles with a planar form factor and compact size. However, it suffers coherent artifacts originating from electromagnetic cross-talk between closely packed meta-atoms and fabrication defects of nanoscale features. Here, we introduce an efficient method to suppress all artifacts by fine-tuning the spatial coherence of illumination. Our method is implemented with a degenerate cavity laser, which allows a precise and continuous tuning of the spatial coherence over a wide range, with little variation in the emission spectrum and total power. We find the optimal degree of spatial coherence to suppress the coherent artifacts of a meta-hologram while maintaining the image sharpness. This work paves the way to compact and dynamical holographic displays free of coherent defects.

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A 300-GHz low-cost high-gain fully metallic Fabry–Perot cavity antenna for 6G terahertz wireless communications

Scientific Reports ◽

10.1038/s41598-021-87076-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Basem Aqlan ◽

Mohamed Himdi ◽

Hamsakutty Vettikalladi ◽

Laurent Le-Coq

Keyword(s):

Communication Systems ◽

Low Cost ◽

Frequency Selective Surface ◽

High Gain ◽

Wireless Communication Systems ◽

Beam Radiation ◽

Compact Size ◽

Fabry Perot ◽

Operating Bandwidth ◽

Polarization Level

AbstractA low-cost, compact, and high gain Fabry–Perot cavity (FPC) antenna which operates at 300 GHz is presented. The antenna is fabricated using laser-cutting brass technology. The proposed antenna consists of seven metallic layers; a ground layer, an integrated stepped horn element (three-layers), a coupling layer, a cavity layer, and an aperture-frequency selective surface (FSS) layer. The proposed aperture-FSS function acts as a partially reflective surface, contributing to a directive beam radiation. For verification, the proposed sub-terahertz (THz) FPC antenna prototype was developed, fabricated, and measured. The proposed antenna has a measured reflection coefficient below − 10 dB from 282 to 304 GHz with a bandwidth of 22 GHz. The maximum measured gain observed is 17.7 dBi at 289 GHz, and the gain is higher than 14.4 dBi from 285 to 310 GHz. The measured radiation pattern shows a highly directive pattern with a cross-polarization level below − 25 dB over the whole band in all cut planes, which confirms with the simulation results. The proposed antenna has a compact size, low fabrication cost, high gain, and wide operating bandwidth. The total height of the antenna is 1.24 $${\lambda }_{0}$$ λ 0 ($${\lambda }_{0}$$ λ 0 at the design frequency, 300 GHz) , with a size of 2.6 mm × 2.6 mm. The proposed sub-THz waveguide-fed FPC antenna is suitable for 6G wireless communication systems.

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