scholarly journals DEVELOPMENT AND OPTIMIZATION OF AN ULTRA WIDEBAND MINIATURE MEDICAL ANTENNA FOR RADIOMETRIC MULTI-CHANNEL MULTI-FREQUENCY THERMAL MONITORING

2020 ◽  
pp. 71-81
Author(s):  
Mikhail Sedankin ◽  
Vitaly Leushin ◽  
Alexander Gudkov ◽  
Igor Sidorov ◽  
Sergey Chizhikov ◽  
...  
Keyword(s):  
Radiation Power ◽  
Fdtd Method ◽  
Depth Resolution ◽  
Wide Band ◽  
Biological Tissues ◽  
Dielectric Substrate ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Design Parameters ◽  
Calculated Mass

The article is devoted to the development of a printed ultra-wideband miniature antenna that can be used for microwave radiometry. An antenna design with a ring-shaped radiator has been proposed, which provides reception of microwave radiation from biological tissues in the 1800–4600 MHz range. The results of mathematical modeling of the antenna electromagnetic field in biological tissues using the finite difference time domain (FDTD) method are presented. Optimization of the antenna design has been carried out to ensure acceptable matching parameters and optimal antenna functionality. The developed antenna has a height of 6 mm and a calculated mass of 5 g; it is planned to manufacture a dielectric substrate based on PDMS polymer with the addition of barium titanate. The issues of calculating the antenna parameters (measurement depth, resolution and distribution of radiation power over the volume of biological tissue, sensitivity, etc.) are considered. The research results and design parameters of the developed antenna demonstrated the effectiveness of the new antenna and the possibility of its adaptation to the object of research. Considering the presence of an ultra-wide band and miniature dimensions, the antenna can be a sensor of a multi-frequency multi-channel microwave radiothermograph

scholarly journals Design & Performance of Wearable Ultra Wide Band Textile Antenna for Medical Applications

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Nikhil Singh ◽  
Ashutosh Kumar Singh ◽  
Vinod Kumar Singh
Keyword(s):  
Return Loss ◽  
Wide Band ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Future Research ◽  
Medical Monitoring ◽  
Hospital Emergency ◽  
Textile Antenna ◽  
Wearable Products ◽  
Work Done

AbstractThe concept of wearable products such as textile antenna are being developed which are capable of monitoring, alerting and demanding attention whenever hospital emergency is needed, hence minimizing labour and resource. In the proposed work by using textile material as a substrate the ultra wideband antenna is designed especially for medical applications.Simulated and measured results here shows that the proposed antenna design meets the requirements of wide working bandwidth and provides 13.08 GHz bandwidth with very small size, washable (if using conductive thread for conductive parts) and flexible materials. Results in terms of bandwidth, radiation pattern, return loss as well as gain and efficiency are presented to validate the usefulness of the current proposed design. The work done here has many implications for future research and it could help patients with such flexible and comfortable medical monitoring techniques.

scholarly journals A Modified Avian Egg Shaped CPW Fed Printed Monopole for SWB Applications

2019 ◽  
Vol 8 (12) ◽  
pp. 2633-2639
Keyword(s):  
Coplanar Waveguide ◽  
Wide Band ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Patch Antennas ◽  
Potential Candidate ◽  
Patch Area ◽  
Printed Monopole ◽  
Swb Applications

A compact egg-shaped super wide-band patch antenna with coplanar waveguide (CPW) feed is proposed. A much simpler design equation has been identified compared to previous reported works for egg-shaped patch antennas. An optimized egg shaped antenna has been designed and implemented on FR4 substrate with the dimensions 30mm x 27.5mm x 1.6mm.The antenna with geometry modifications has an impedance bandwidth 2.85-31.6 GHz. The performance of the antenna was validated analytically for super wideband (SWB) operation and experimentally for ultra-wideband (UWB) operation. A maximum gain of 4.4dBi and a minimum of 2dBi was observed at 6.5GHz and 3GHz respectively. A 30% reduction in patch area has been achieved compared to existing egg-shaped SWB antennas in literature. The lower frequency bound of the antenna is scalable with dimensions for lesser permittivity substrates which has been analytically validated. It is identified that the proposed antenna design could be used to achieve flexibility in bandwidth. This antenna is a potential candidate for super wideband applications.

scholarly journals Evolutionary Computing based Neuron-Computational Model for Microstrip Patch Antenna Design Optimization

2021 ◽  
Vol 13 (03) ◽  
pp. 15-40
Author(s):  
Rohini Saxena ◽  
Mukesh Kumar ◽  
Shadman Aslam
Keyword(s):  
Genetic Algorithm ◽  
Patch Antenna ◽  
Evolutionary Computing ◽  
Microstrip Patch Antenna ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Design Parameters ◽  
Adaptive Genetic Algorithm ◽  
Microstrip Patch ◽  
Depth Analysis

In this paper, a novel Evolutionary Computing named Adaptive Genetic Algorithm (AGA) based ANN model is developed for rectangular MPA (Microstrip patch antenna). Considering at-hand and Nextgeneration Ultra wideband application demands, the emphasis has been made on retaining optimal lowcost design with desired cut-off frequency. The proposed method employs multiple sets of theoreticallydriven training instances or patch antenna design parameters which have been processed for normalization and sub-sampling to achieve a justifiable and reliable sample size for further design parameter prediction. Procedurally, the input design parameters were processed for normalization followed by sub-sampling to give rise to a sufficient set of inputs to perform knowledge-driven (designparameter) prediction. Considering limitations of the major at-hand machine learning methods which often undergo local minima and convergence while training, we designed a state-of-art new Adaptive Genetic Algorithm based neuro-computing model (AGA-ANN), which helped to predict the set of optimal design parameters for rectangular microstrip patch antenna. The predicted patch antenna length and width values were later used for verification which achieved the expected frequency. The depth analysis revealed that a rectangular patch antenna with width 14.78 mm, length 11.08mm, feed-line 50 Ω can achieve the cut-off frequency of 8.273 GHz, which can be of great significance for numerous UWB applications.

A Tapered Fork-Shaped Antenna With Small Ground Plane for UWB Applications

2021 ◽  
Vol 13 (1) ◽  
pp. 13-24
Author(s):  
Amro A. Nour ◽  
Ali Bostani ◽  
Girish Awadhwal
Keyword(s):  
Finite Element ◽  
Impedance Matching ◽  
Ground Plane ◽  
Wide Band ◽  
Federal Communications Commission ◽  
Ultra Wideband ◽  
Design Parameters ◽  
Uwb Antenna ◽  
Bandwidth Enhancement ◽  
Uwb Applications

A tapered fork-shaped antenna having small ground for ultra-wide band (UWB) antenna is proposed in this paper. Finite element method has been successfully employed to simulate and optimize the feed line, ground, and tapered fork-shaped diameter to enhance the performance of the antenna in terms of bandwidth obviously for the ultra-wideband purposes. An acceptable impedance matching performance has been achieved, which is a band wider than the UWB band that is defined by the Federal Communications Commission (FCC). In this paper, the detailed design parameters including the key elements in bandwidth enhancement is presented. The results of the finite element simulations have been presented as well indicating the return loss and radiation pattern of the proposed antenna.

Measurement Analysis of Ultra-Wide-Band and Ultra-Wide-Band-MIMO Antennas

2019 ◽  
pp. 99-119
Author(s):  
Madan Kumar Sharma ◽  
Mithilesh Kumar Kumar ◽  
Satya P. Singh
Keyword(s):  
Free Space ◽  
Communication Systems ◽  
Wide Band ◽  
Electromagnetic Energy ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Ultra Wide Band ◽  
Uwb Antenna ◽  
Mimo Antennas ◽  
Measurement Analysis

This chapter mainly focused on the recent trends in the antenna design techniques for next-generation wireless communication systems. Ultra-wideband antenna and multi-input-multi-output antennas are very useful to achieve higher data rates. An antenna is a transducer that changes guided electromagnetic energy in a transmission line to radiated electromagnetic energy in free space. Antennas may also be observed as an impedance transformer, coupling among an input or line impedance, and the impedance of free space. The looming widespread commercial deployment of ultra-wideband (UWB) systems has flashed new interest in the subject of ultra-wideband antennas. The power levels approved by the FCC mean that every dB counts in a UWB system as much as or possibly even more so than in a standard narrowband system. Thus, in effect, UWB antenna is a precarious part of an overall UWB system design. Basic principles for ultra-wide-band (UWB) antenna design and radiation are presented and discussed in this chapter.

scholarly journals Design of planar plate monopole antenna with vertical rectangular cross-sectional plates for ultra-wideband communications

2018 ◽  
Vol 31 (4) ◽  
pp. 641-650 ◽  
Author(s):  
Seyed Naghdehforushha ◽  
Mahdi Bahaghighat ◽  
Mohammad Salehifar ◽  
Hossein Kazemi
Keyword(s):  
Cross Sections ◽  
Return Loss ◽  
Wide Band ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Cross Sectional ◽  
Monopole Antennas ◽  
Wideband Communications ◽  
Novel Design

In this paper, a novel design for planar plate monopole antennas is proposed with applications to ultra-wide band (UWB) communications. To verify the proposed antenna design, simulations are performed by means of CST and HFSS software tools, showing that the impedance bandwidth is significantly increased by vertical cross-sections. By adding a series of parameters to the vertical cross sections, the antenna efficiency is effectively enhanced by achieving a return loss of 10 dB over the bandwidth range between 3.1 GHz and 10.6 GHz. In addition, our experimental results demonstrate that the fabricated antenna has a return loss performance similar to that obtained by the simulation results.

scholarly journals Design of a wideband strip helical antenna for 5G applications

2020 ◽  
Vol 9 (5) ◽  
pp. 1958-1963
Author(s):  
Mohammed Yousif Zeain ◽  
M. Abu ◽  
Z. Zakaria ◽  
Ahmed Jamal Abdullah Al-Gburi ◽  
R. Syahputri ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Resonant Frequency ◽  
Circular Polarization ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Design Parameters ◽  
Helical Antenna ◽  
Wireless Applications ◽  
Potential Applications

This paper presents the design of wideband strip helical antenna for 5G Application. The strip helical antenna is designed for 5G and wideband applications that provide a wide bandwidth and circular polarization. The helical antenna is planned on at 5.8 GHz frequency by using Teflon material. The new designed strip is printed on a substrate then rolled into a helix shape to achieve circular polarization without an impedance matching and that the proposed antenna can be used for potential applications in wideband wireless communication. A wideband bandwidth of 2.41 GHz with a resonant frequency at 5.8 GHz is achieved by the helical antenna on the Teflon substrate. The presented antenna on Teflon substrate has achieved a gain of 11.2 dB. The antenna design parameters and the simulated results are achieved using the commercial software CST. The proposed antenna can be used for various wireless applications such as Wideband, Ultra wideband, 5G and wireless Applications.

Design and Analysis of Ultra-wideband and High Directive THz Photoconductive Vivaldi Antenna

2020 ◽  
Vol 35 (10) ◽  
pp. 1242-1254
Author(s):  
Jawad Yousaf ◽  
Amira Dhiflaoui ◽  
Ali Yahyaoui ◽  
Bandar Hakim ◽  
Mohamed Zarouan ◽  
...  
Keyword(s):  
Quartz Substrate ◽  
Ultra Wideband ◽  
Antenna Design ◽  
Design Parameters ◽  
Photoconductive Antenna ◽  
Frequency Range ◽  
Vivaldi Antenna ◽  
Silicon Based ◽  
First Time ◽  
Novel Design

In this work a novel design of an ultra-wideband and highly directive Vivaldi photoconductive antenna (PCA) is reported for the first time for the THz sensing and imaging applications. The optical-to-THz conversion efficiency for the enhanced directivity of the reported PCA is enhanced by adding a hemispherical silicon-based lens with the PCA gold electrode and quartz substrate (Epsilon r = 3.78, tan delta = 0.0001). The optimization of the antenna design parameters is performed in CST MWS for the frequency range of 1-6 THz. The design antenna has UWB -10 dB impedance and 3-dB AR bandwidths of 6 THz, maximum directivity of 10 dBi and maximum total radiation efficiency of > 40%.

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