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[IEEE 2018 3rd International Conference for Convergence in Technology (I2CT) - Pune (2018.4.6-2018.4.8)] 2018 3rd International Conference for Convergence in Technology (I2CT) - A Star Shaped Superwide Band Fractal Antenna for 5G Applications
摘要： A superwide band (SWB) microstrip fractal antenna for 5G communication is proposed in this paper and a snow?ake like structure is achieved using star shaped fractal geometry. The con?guration of the proposed design has a substrate of Rogers RT5880 having thickness of 0.787mm, dielectric constant of 2.2 and loss tangent of 0.0009. The presented antenna is simulated using CST Microwave studio and parameters of the proposed structure are optimized so that it is suitable to be operated in the frequency range from 17.22GHz to 180GHz with the fractional bandwidth of 165%. The overall dimension of the antenna is just 20mm×20mm which is very compact. The peak gain of 10dBi and average gain of 6.4dBi is acquired and over all appreciated gain is maintained throughout the entire range. Result curves such as S-parameter, VSWR, radiation pattern, gain and Input impedance have been depicted and discussed in the paper.
关键词： 5G Technology,Snow?ake structure,Fractal antenna,Star shaped,Superwideband (SWB),Microstrip patch antenna
更新于2025-09-04 15:30:14
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Sub-Wavelength Reflectarray Element Based on Minkowski Fractal Loop
摘要： A novel reflectarray element consists of one Minkowski fractal loop in combination of a square loop is proposed. The size of the element is two fifth of a wavelength of the working frequency of 5.8 GHz. The proposed element offers a slope value of 20°/mm, while the phase range is in excess of 411°. Utilizing the proposed element, a 10 × 10 reflectarray antenna is simulated. Simulation results show that the antenna gain is 18.9 dBi at its working frequency 5.8 GHz, and has an impedance bandwidth (|S11| < -10 dB) of 3% (5.73 ~ 5.9 GHz).
关键词： Minkowski fractal loop,reflectarray element,antenna gain,square loop,phase range
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - Mauritius (2018.10.15-2018.10.18)] 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - High Gain Fractal Cylindrical Dielectric Resonator Antenna for UWB Application
摘要： In this paper, a novel Fractal Cylindrical Dielectric Resonator Antenna (FCDRA) is presented for Ultra-Wide Band applications is constructed by 300, 600, 1200 angular portion of cylinder with radius ratio (1:2:3). Stacking of Rogers 3010 (εr =10.2) and FR- 4 (εr =4.4) dielectric materials are used in proposed antenna for enhancement of the bandwidth. This fractal geometry offers 9.2 GHz operating bandwidth which spans from 3.6 GHz – 12.8 GHz. Proposed antenna attains maximum gain of 9.45 dBi with more than 89% efficiency which is suitable for satellite communication, WiMAX application. Hybrid Electromagnetic HE11δ, HE12δ modes are identified at 4.43 GHz & 8.31 GHz resonant frequencies respectively.
关键词： WiMAX,FR-4,Rogers 3010,satellite communication,Fractal Cylindrical Dielectric Resonator Antenna,Ultra-Wide Band,Hybrid Electromagnetic modes
更新于2025-09-04 15:30:14
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The Behavior of CPW-Fed Sierpinski Curve Fractal Antenna
摘要： In this paper, the behavior of Coplanar Waveguide (CPW) fed SIERPINSKI curve fractal antenna is studied. The results show that there is a relationship between the iteration number and the resonance frequencies. With increase in the number of iteration the resonance frequency decreases with a constant ratio. The use of fractal structures to design antennas makes them more miniaturized. The simulated results obtained from CADFEKO a Method of Moments (MoM) model based Solver and measurement using Vector Network Analyzer Anritsu MS2026C are in good agreement.
关键词： SIERPINSKI Curve,Fractal Antennas,Antenna design
更新于2025-09-04 15:30:14
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Fourier Optics of Fractal Structures
摘要： The scaling characteristics of Fourier spectra of fractal structures are determined. Their stability and influence on cognitive processes associated in particular with the aesthetic aspects of perceiving objects with self-similarity criteria are estimated. Evidence of their heuristic importance for Fourier analysis results is presented using an example in which the properties of aperiodic multilayer structures and chaotic processes are considered.
关键词： scaling characteristics,fractal structures,aperiodic multilayer structures,Fourier optics,cognitive processes,chaotic processes
更新于2025-09-04 15:30:14
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Fractal Filters Intended for Signal Detection during Remote-Sensing Data Processing
摘要： A new approach to processing and analysis of noisy data inherent to the optical systems of Earth remote sensing systems is proposed and investigated. This approach involves the system integration of several conceptual ideas based on the multiscale representation of fractal sets, recursive scans, and wavelet transforms, making it possible to improve the signal detection efficiency under complex background?target conditions.
关键词： signal detection,wavelet transforms,multiscale representation,recursive scans,fractal filters,remote-sensing data processing
更新于2025-09-04 15:30:14
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Super-resolution microscopy and empirically validated autocorrelation image analysis discriminates microstructures of dairy derived gels
摘要： The food industry must capitalise on advancing technologies in order to optimise the potential from emerging ingredient technologies. These can aid in product optimisation and provide quantitative empirical data to which there is a fundamental physical understanding. Super-resolution microscopy provides a tool to characterise the microstructure of complex colloidal materials under near native conditions. Coherent Anti-Stokes Raman Scattering (CARS) microscopy was used to show the presence of fluorescent dye required for imaging does not affect gel microstructure and super-resolution Stimulated Emission Depletion (STED) microscopy is used to image four dairy derived gels. Image analysis has been developed based on 2D spatial autocorrelation, and a model that extracts parameters corresponding to a typical length of the protein domains and the inter pore distance. The model has been empirically validated through the use of generated images to show the fitting parameters relate to precise physical features. The fractal dimension is extracted from Fourier space analysis. The combination of STED microscopy and image analysis is sensitive enough to significantly differentiate samples based on whether gels were made from fresh or reconstituted milk, and whether gelation was induced through acidification or rennet addition. Rheometry shows that the samples exhibit different macroscopic behaviours, and these differences become increasingly significant with time. Samples can be differentiated earlier in the gelation process with imaging as compared to rheometry. This highlights the potential of STED imaging and image analysis to characterise the size of protein domains, pore spacing and the fractal dimensions of microstructures to aid product optimisation.
关键词： Stimulated Emission Depletion (STED) microscopy,Super-resolution microscopy,Fractal dimension,Coherent Anti-stokes Raman Scattering (CARS) microscopy,2D spatial autocorrelation analysis
更新于2025-09-04 15:30:14