Wideband Sierpinski Carpet Fractal Shaped Cylindrical Dielectric Resonator Antenna for X-Band Application (original) (raw)
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Radio electronics and communications systems, 2018
This paper presents a wideband Sierpinski carpet fractal patterned rectangular Dielectric Resonator Antenna (DRA) operating in the X-band, which is characterized by dielectric waveguide model method (DWM). In order to decrease the cost of the DRA the low-cost teflon is used as the material. A prototype is realized to validate the results of the simulation. The paper provides a comparison between conventional rectangular DRA and fractal shaped rectangular DRAs of the first and the second iterations. The antenna design methodology is discussed along with its resonance and radiation characteristics. The validity of the obtained results is proved by the close match of the experimental and simulation results. The measurements on prototype show impedance bandwidth of 48% covering the entire X-band with similar radiation pattern throughout the band with a gain of 7.5 dBi over 9.0-11.5 GHz.
A broadband Sierpinski gasket-shaped triangular dielectric resonator antenna for X-band
International Journal of Signal and Imaging Systems Engineering, 2013
In this work, a wideband Sierpinski gasket patterned equilateral triangular Dielectric Resonator Antenna (DRA) operating in the X-Band is proposed. This DRA is realised using Teflon. Its resonance and radiation characteristics are discussed. The resonance characteristics of Sierpinski gasket triangular DRA of first iteration and second iteration are reported that show an improvement in impedance bandwidth. An impedance bandwidth of 40% is obtained covering the entire X-band with similar radiation pattern throughout the band. The average peak gain within the band is about 6.5 dBi.
Progress In Electromagnetics Research C
This paper presents a novel compact Koch snowflake fractal ring based Dielectric Resonator Antenna (DRA) for ultra wideband application. Firstly, Koch snowflake fractal geometry is implemented on the conventional Cylindrical Dielectric Resonator Antenna (CDRA). Further, the performance of the DRA is enhanced by fractal ring created on the snowflake geometry. With the application of the fractal and the fractal ring geometry, the Q-factor of DRA is reduced, thus the bandwidth of DRA is increased. The proposed antenna offers a wide impedance bandwidth of 90% ranging from 4.7 GHz-12.4 GHz. The effect of the fractal geometry enhances the gain of DRA. The proposed antenna achieves radiation efficiency more than 78%, throughout the bandwidth. Interestingly, the proposed configuration reduces the DRA volume by 76.63% with reduced volume of 7.91 cm 3. The experimental verification of the proposed structure shows good agreement between simulated and measured results.
A modified Sierpinski carpet fractal antenna for wireless applications
2013 International Conference on Communication and Signal Processing, 2013
The sudden growth in wireless communication area has increased the requirements of compact integrated antennas. This paper describes the design of Modified Sierpinski Carpet Fractal Antenna which resonates at six frequencies 4.825, 5.455, 6.265 GHz and 6.805, 8.02 and 9.145 GHz. Different performance parameters like radiation pattern, gain, Voltage Standing Wave Ratio, return losses are observed at all the frequencies. The FR4 glass epoxy with relative permittivity 4.4 and height 1.6 mm is used as substrate material. Antenna is fed by coaxial probe feed and simulated using ANSYS/ANSOFT HFSS V13 software. Proposed antenna has simple structure. Investigation is done between 1 and 10 GHz frequencies. The proposed antenna is fabricated and tested on the Vector Network Analyzer. The measured and simulated results of proposed antenna are compared and are found to be good agreement with each other.
Design and Analysis of Sierpinski Carpet Fractal Antenna for Two Different Substrate Materials
International Journal for Scientific Research and Development, 2014
A simple method to modify the different properties of the antenna by changing the substrate, as height and dielectric constant of the substrate influence the antenna properties. In this paper, a Sierpinski Carpet Fractal antenna is designed and the properties are compared with respect to different substrate materials [12-13]. II. ANTENNA DESIGN The Sierpinski Carpet Fractal antenna is designed with edge triggered feeding. The compact design of proposed antenna has been printed on the Rogers RT/duroid and FR-4 substrates with a thickness of 1.6 mm for both substrate and dielectric constant of 2.2 & 4.4 and , and loss tangent of 0.0009 and 0.001respectively for both substrate.
Design and Analysis of Sierpinski Carpet Fractal Antenna
2015
The combination of fractal geometry with electromagnetic theory has led to useful and innovative antenna designs. This paper presents the design of Sierpinski carpet fractal antenna up to third iteration. The proposed antenna is designed on FR4 substrate with dielectric constant of 4.4. The antenna have been optimized to operate in multiple bands between 5-20 GHz. Sierpinski Carpet Fractal Antenna (SCFA) have been analyzed in term of various parameters like return loss, Total Field Gain, Directivity, Radiation pattern & VSWR etc.
MODIFIED SIERPINSKI CARPET FRACTAL ANTENNA FOR WIRELESS APPLICATION
This paper describes the design and fabrication of modified multiband Sierpinski Carpet Fractal antenna. This paper proposed the investigation of frequency ranges between 1GHz to 10GHz. This modified fractal antenna is capable to resonate at multiband frequency range.The proposed antenna resonates at frequencies 2.55 GHz, 3.79 GHz, 6.54 GHz, and 8.6 GHz with overall bandwidth of1212 MHz at the second iteration. The stimulation process is done on CST(Computer Simulation Technology).
Design and Analysis of New Sierpinski Carpet Fractal antenna
World Academy of Research in Science and Engineering
Design and analysis of new geometry for microstrip patch Sierpinski carpet fractal antenna is discussed. This Fractal structure is implemented on square and several iterations are applied on initial shape. This antenna has low profile with dimensions of 80X80X1.6 mm, low weight and easy to fabricate with coaxial feeding. The simulation results show that the proposed antenna has very good performance in return loss, impedance bandwidth and radiation characteristics. Finite element method has been employed for studying various other antenna parameters like gain and field distributions. Effect of antenna iterations stresses upon reducing metal usage thereby saving cost and also achieved good reflection coefficient.
Parametric study of novel types of dielectric resonator antennas based on fractal geometry
International Journal of RF and Microwave Computer-Aided Engineering, 2007
Dielectric resonator antennas with fractal cross sectional areas have been investigated. Two main configurations of these novel types of dielectric resonator antennas have been examined. Analyses of these proposed dielectric resonator antennas are performed numerically using the finite element method and verified by the finite integration technique. Agreement between the methods is excellent. The effects of antenna parameters, such as fractal iteration level and tapering rate of dielectric resonator, are investigated.
The paper presents the designs of two Sierpinski carpet fractal antennas. The fractal properties have been applied in order to designs compact and wideband antennas. The antennas are analyzed in term of radiation parameters such as reflection coefficients, voltage standing wave ratio and radiation patterns. The results shows that the bandwidths of the antennas at the reflection coefficient less than-10dB are 5.5GHz and 7.25GHz ranging from 8.3GHz to 2.8GHz and 4.75GHz to 12GHz respectively. The directivities of antenna are 5.109dBi, 6.952dBi, 6.696dBi and the gains are 5.11dBi, 6.95dBi, and 6.7dBi. The bandwidth is largest at high resonance points with increasing the number of iterations. The proposed designs are suitable for wireless applications such as Wi-Fi, WiMAX, WLAN, Bluetooth, WCDMA and GSM.