Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

&nbsp;

&nbsp;

VIT University

Background: The CPW fractal antenna has been designed with hexagonal-cut, square-cut, triangular-cut shaped geometries on a composite material of Fr4 as a substrate with ϵr=4.4 of relative permittivity and 1.6mm thickness. Methods/Statistical analysis: In this paper, a comparative analysis for three different shaped CPW fractal antennas designed based on iterative function systems of self-similarity structures. To improve the gain, Frequency Selective Surface (FSS) is used for the fractal antenna design. Findings: The gain comparison of CPW fractal antenna with and without FSS of two different structures for three proposed CPW fractal shaped antennae are investigated. After implementing with FSS gain of the three antennas has improved with 3dB. The simulation results of return loss and gain are observed using the HFSS software. Application: The resonant frequency for the designed CPW antenna is 5.8 GHz and it is useful for WiMAX application. © 2017 IEEE.

Computer Science

School of Computer Science and Engineering

Chennai Campus

Electronics

School of Electronics Engineering

2017 International Conference on Nextgen Electronic Technologies: Silicon to Software (ICNETS2)

Study on CPW antenna using fractal geometry for WiMax application

This paper presents a low profile sierpinski fractal antenna for ultra wide band applications. The proposed antenna is designed by incorporating sierpinski fractals inside a circular ring of width 1mm which improves the impedance band width and radiation efficiency of the antenna. The proffered antenna of dimensions 29×28×1.6 mm3 covering the frequency range of 3.7 to 14.3 GHz with radiation efficiency of 92% is fed by microstrip feed line. The radiation pattern is stable over the operating UWB range. Sierpinski fractal UWB antenna is designed and simulated using High Frequency Structure Simulator (HFSS). © 2015 IEEE.

Department of Sensor and Biomedical Technology

Vellore Campus

Department of Communication Engineering

2015 Global Conference on Communication Technologies (GCCT)

Design of sierpinski fractal UWB antenna

This paper presents a low-profile, single layered rectangular microstrip patch antenna designed to operate for 2.45GHz and 4.96GHz frequency band of IEEE 802.11.A rectangular patch of dimensions 18.6×26.8mm is positioned above the surface of an Alumina (Al2O3 ceramic) substrate at a height of 4mm from the ground plane and fed by coaxial feed configuration to operate at 2.45GHz frequency band (IEEE802.11b/g/n). On loading a notch over the radiating patch dual frequency behaviour of the antenna is achieved and it resonates at both 2.45GHz and 4.96GHz frequency band(IEEE802.11y). The proposed antenna has a unidirectional radiation pattern. This probe feed antenna is designed and simulated using High Frequency Structure Simulator (HFSS) v13.0. © 2015 IEEE.

Department of Mathematics

School of Advanced Sciences

2015 2nd International Conference on Electronics and Communication Systems (ICECS)

Design of a miniaturized dual band patch antenna for WLAN applications

This paper deals with the closed loop operation of semi-dual active bridge(S-DAB) converter for battery charger applications. The semi-dual active bridge (S-DAB) converter is obtained from Dual Active Bridge converter (DAB) by replacing the active (four switches) to semi-Active (two switches) on the load side. As the no of switches are less when compared to Dual Active Bridge converter (DAB), it has high efficiency, unidirectional power flow and less stress on switches. Along with the above advantages it undergoes zero voltage switching (ZVS) without the requirements of any active or passive components. A controller is also designed for the enhancement of the closed loop operation of the semi-dual active bridge (S-DAB) converter. Hence it can be used for high/low voltage applications. The complete design and simulation of the semi-dual active bridge (S-DAB) converter with the controller is carried out in MATLAB/Simulink. © 2014 IEEE.

VIT Unitversity

Department of Energy and Power Electronics

School of Electrical Engineering

2014 International Conference on Science Engineering and Management Research (ICSEMR)

Matlab/Simulink based closed loop operation of semi-dual active bridge DC-DC converter