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Author

Ashwini Kumar

Bio: Ashwini Kumar is an academic researcher from Sant Longowal Institute of Engineering and Technology. The author has contributed to research in topics: Fractal antenna & Radiation pattern. The author has an hindex of 2, co-authored 10 publications receiving 22 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a modified Hilbert curve fractal (MHCF) antenna with parasitic patches for multiband applications is presented, where the fractal antenna has been designed on a dual-layer substructure.
Abstract: This paper presents the development of a Modified Hilbert Curve Fractal (MHCF) antenna with parasitic patches for multiband applications. The fractal antenna has been designed on a dual-layer subst...

12 citations

Journal ArticleDOI
TL;DR: In this article, a coplanar waveguide (CPW)-fed triple band fractal antenna for radio navigation and fixed satellite services has been proposed, which has low profile, multiband and wideband performance.
Abstract: This study reports the design of a coplanar waveguide (CPW)-fed triple band fractal antenna for radio navigation and fixed satellite services. Reported antenna has low profile, multiband and wideband performance which make it suitable for the radio navigation and fixed satellite services in S band, C bandand X band. Proposed antenna resonates at 2.6GHz, 4.4GHz, and 8.7 GHz having bandwidth of 0.2457GHz, 0.700GHz, and 4.1980 GHz respectively. Maximumgain for the resonating bands is 3.6 dB, 5.5 dB, and 7.3 dB respectively. Simulated performance parameter of proposed antenna is verified experimentally by testing the fabricated antenna. Measured and simulated results are in good agreement

8 citations

Journal ArticleDOI
TL;DR: Dragonfly Optimization is executed in combination with Polynomial Curve-fitting method for optimizing three different geometrical dimensions of unit antenna element in the proposed system, and the results of present study are quite promising.
Abstract: Present-day wireless communication requires high performance antenna systems having conformal shape, aerodynamic profile, compact size, uncomplicated design and simple manufacturability. Moreover, such systems should be lighter in weight as well as cost effective too. In case of fixedsatellite communication as well as maritime radio-navigation, the situation becomes even more demanding in respect of these requirements. However, to meet these requirements, printed micro-strip patch technology is used frequently in these days for the fabrication of such high performance antenna systems. However, printed microstrip antennas usually suffer from the drawbacks of having lower gain and/or lower bandwidth as well as return loss. In order to address these issues, the present paper reports on the design of a small-sized 2×2 Element Sierpinski Carpet Fractal Antenna Array using swarm-inspired Dragonfly Optimization. Proposed antenna array operates efficiently at 5.6 GHz, 7.4 GHz and 10.7 GHz with an achievement of 202MHz, 470MHz, and 883MHz bandwidths respectively for the specified spectrum bands. In order to bring about substantial improvement in the performance of the designed antenna array, Dragonfly Optimization is executed in combination with Polynomial Curve-fitting method for optimizing three different geometrical dimensions of unit antenna element in the proposed system. The results of present study are quite promising.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a half T-square strip fractal antenna has been designed on FR4 substrate with a size of 26.5 × 20 × 1.1 mm and it has been reported that the reported antenna resonates very well.
Abstract: In this paper, a novel half T-square strip fractal antenna has been proposed. The antenna has been designed on FR4 (ɛr = 4.4) substrate with a size of 26 × 20 × 1 mm. The reported antenna resonates...

3 citations

Proceedings ArticleDOI
01 Mar 2019
TL;DR: In this paper, a wideband Sierpinski Carpet Fractal Antenna (SCFA) is reported, which is designed on a low-cost FR4 substrate, with modified CPW feed which resonates at three frequencies 1.19-2.06 GHz, 6.53 GHz and 8.99 GHz.
Abstract: In this report, a wideband Sierpinski Carpet Fractal Antenna (SCFA) is reported, which is designed on a low cost FR4 substrate. Proposed SCFA is designed with modified CPW feed which resonates at three frequencies 1.51 GHz (1.19-2.06GHz), 6.53 GHz and 8.99 GHz (4.44-9.54 GHz). The reported SCFA covers applications like Radio Navigation Services (RNS) and Fixed Satellite Services (FSS) in L-Band, C-Band and X-Band. Proposed SCFA is characterized using various parameters like reflection coefficient (S11), radiation pattern, gain and bandwidth.

3 citations


Cited by
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01 Jan 2016

157 citations

Journal ArticleDOI
04 Jun 2020
TL;DR: In this article, the dependence of the base frequency and the reflection coefficient on the dipole wire length and scale is analyzed, and it is shown that it is possible to distinguish a family of antennas operating at a given (identical) base frequency.
Abstract: Koch-type wire dipole antennas are considered herein. In the case of a first-order prefractal, such antennas differ from a Koch-type dipole by the position of the central vertex of the dipole arm. Earlier, we investigated the dependence of the base frequency for different antenna scales for an arm in the form of a first-order prefractal. In this paper, dipoles for second-order prefractals are considered. The dependence of the base frequency and the reflection coefficient on the dipole wire length and scale is analyzed. It is shown that it is possible to distinguish a family of antennas operating at a given (identical) base frequency. The same length of a Koch-type curve can be obtained with different coordinates of the central vertex. This allows for obtaining numerous antennas with various scales and geometries of the arm. An algorithm for obtaining small antennas for Wi-Fi applications is proposed. Two antennas were obtained: an antenna with the smallest linear dimensions and a minimum antenna for a given reflection coefficient.

14 citations

Journal ArticleDOI
TL;DR: In this paper, a modified Hilbert curve fractal (MHCF) antenna with parasitic patches for multiband applications is presented, where the fractal antenna has been designed on a dual-layer substructure.
Abstract: This paper presents the development of a Modified Hilbert Curve Fractal (MHCF) antenna with parasitic patches for multiband applications. The fractal antenna has been designed on a dual-layer subst...

12 citations