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.

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VIT University

In this paper, a dual band antenna is designed using fractal geometry. The paper presents a triangular sierpinski fractal antenna which gives higher bandwidth of 670MHz & 1070MHz at resonant frequencies of 10.89GHz & 15.92GHz respectively. So, the triangular patch is used in this fractal antenna which adds some extensive applications in wireless industry. The multiband and ultra wide band properties of antenna are due to their self similarity of fractal geometry while the space filling properties of antenna leads to the miniaturization of antenna. This antenna miniaturization and self similarity property of triangular fractal structure is used for reducing antenna size and for obtaining dual band resonance with high gain of 7.0954dB at 10.89GHz. The double substrate structure is used for obtaining the efficient radiation characteristics which also influences gain and bandwidth of fractal antenna. The fractal antenna is also miniaturized by introducing various iterative procedures in sierpinski fractal structure that is considered as an attempt which has been made to design an antenna of compact size and good radiation characteristics. © 2015 IEEE.

VIT Unitversity

Electronics

School of Electronics Engineering

Chennai Campus

2015 2nd International Conference on Signal Processing and Integrated Networks (SPIN)

High gain dual band antenna using fractal geometry for mobile communication

Log periodic antennas are widely used in ultra wideband applications. This paper compares the coplanar waveguide and microstrip feed of log periodic array antennas in terms of gain, bandwidth, design complexity and also the effect of the antenna on different substrates. The design criteria of both types of antennas are discussed in detail. The two different types of feeding techniques for the antenna are simulated using High Frequency Structure Simulator which uses efficient Finite Element Method for rigorous electromagnetic analysis. The results are compared and comparison table gives the clear idea of choosing the feed and also the substrate material. © 2015 IEEE.

Department of Mathematics

School of Advanced Sciences

Vellore Campus

Compartive study of coplanar waveguide feed and microstrip feed for log periodic antennas

A X-Band microstrip filter for the reduction of size, to improve the rejection in band using modified defected ground structure (DGS) is proposed. Here different types of uniform and non-uniform DGS and its equivalent lumped L-C circuit model are presented for the parametric relationship and the comparison of pass-band in-between the rejection bands. Then an improved defected ground structure (DGS) with compensated microstrip line is investigated for band pass filter (BPF) for the uplink frequency at X-band. © 2015 IEEE.

2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO)

X-band microstrip pass-band filter using non-uniform DGS structure

In this paper the study of different shapes of defected microstrip structure is made with standard 50-ohm transmission line is perturbed with to generate rejection band at S and C-Band that is beneficial to higher order harmonic suppression. A comparison of G shaped, T shaped and Hash shaped Defected microstip structure has been evaluated and a comparative study is made. © 2006-2015 Asian Research Publishing Network (ARPN).

World University root node

ARPN Journal of Engineering and Applied Sciences

Analysis of different shapes of defected microstrip structure (DMS) and their stop-band performance

In wireless communication, antenna miniaturization is a vital issue these days. This paper presents the simulation analysis of small planar antennas using different antenna miniaturization techniques. They have brought to define miniaturization methods by which we can estimate the use of micro strip antennas. Various govt. and private sector organizations made use of these techniques to solve the problem of antenna fabrication in mobiles, satellites, missiles, radar navigational aids and military applications. These techniques are used to reduce the physical size but to increase the bandwidth and efficiency of antenna. Some approaches for antenna miniaturization are introduction of slots, slits, short meandering and novel geometries like fractals or by using higher dielectrics constant. The effect of miniaturization in various antenna parameters like, radiation efficiency, gain and bandwidth are discussed. Finally the paper reports a brief description of miniaturization of antenna by using suitable and efficient methods that includes use of double layered substrate structure in microstrip patch antenna. © 2014 IEEE.

2014 Eleventh International Conference on Wireless and Optical Communications Networks (WOCN)

Antenna miniaturization techniques for wireless applications

a micro strip filter using modified defected microstrip structure (DMS) is proposed with miniaturized size and improved rejection in required band. We have done simulation and comparative analysis of microstrip filter using different types of uniform and non-uniform DMS. Its equivalent lumped L-C circuit model is presented for the parametric relationship analysis. Comparison for band-pass and in-between the rejection band has been performed. After comparison of different DMS structure a novel defected micro-strip structure (DMS) with compensated microstrip line is designed, investigated and simulated for Wide band Low pass filter (WBLPF) performance. This can be applicable for S and C-band Radar application. © Research India Publications.