About Me |
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WITH OVER 10 YEARS OF TEACHING EXPERIENCE, I AM PURSUING Ph.D IN CUTM SINCE 2011-NOVEMBER AND COMPLETED M.TECH IN ANDHRA UNIVERSITY COLLEGE OF ENGINEERING IN 2006. |
Research Fields
- Enhancement of Gain&Bandwidth for Miniaturized Slot Antennas AND Increasing conversion efficiency of optical to EM
Teaching
- MICROWAVE ENGINEERING(7TH SEMESTER)
- ANTENNAS AND WAVE PROPAGATION(6TH SEMESTER)
- COMMUNICATION SYSTEMS(8TH SEMESTER)
- ANALOG ELECTRONIC CIRCUITS(3RD SEMESTER)
- RADAR AND TV ENGINEERING(5TH SEMESTER)
- SEMICONDUCTOR ELECTRONIC DEVICES(3RD SEMESTER)
- ELECTRONIC DEVICES AND CIRCUITS(1ST SEMESTER)
- COMMUNICATION ENGINEERING(7TH SEMESTER)
- SATELLITE COMMUNICATIONS(7TH SEMESTER)
Expertise
- MICROSTRIP PATCH ANTENNAS GAIN AND BANDWIDTH ENHANCEMENT
- BACKPROPAGATION ALGORITHM APPLICATION TO PATCH ANTENNAS
Interests
- Enhancement of Gain&Bandwidth for Miniaturized Slot Antennas AND Increasing conversion efficiency of optical to EM
Research Fields
I AM INTERESTED IN BROAD BAND ANTENNAS,PRINTED ANTENNAS AND NEURAL NETWORKS APPLICATIONS
Recent Publications (International Journals)
| Sl. No. | Title | Issuer |
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Academic Honors & Awards
Publicaion 1
Finding Optimum Gain and Return Loss of a Circular Microstrip Patch Antenna Using KBNN at 3.7GHz
Publisher: IJIREEICE
Volume: Vol. 3, Issue 5, May 2015
ISBN: INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH IN ELECTRICAL, ELECTRONICS, INSTRUMENTATION AND CONTROL ENGINEERING
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
Antennas are key components of any wireless communication system. Patch antennas are widely used as they offer low-profile designs for a wide range of wireless applications. The design of circular patch antenna is presented in this paper and the simulated results are compared with the general well-known results of antenna’s performance incorporating its radiation property, gain, port characteristics and s-parameters. The optimum gain was observed at the substrate thickness of 0.35mm and here the return loss (S11) is -22dB but return loss is still good at radius of patch 21.5mm with increasing gain. Modelling was done using backpropagation algorithm (KBNN) and simulations were done using HFSS.
Antennas are key components of any wireless communication system. Patch antennas are widely used as they offer low-profile designs for a wide range of wireless applications. The design of circular patch antenna is presented in this paper and the simulated results are compared with the general well-known results of antenna’s performance incorporating its radiation property, gain, port characteristics and s-parameters. The optimum gain was observed at the substrate thickness of 0.35mm and here the return loss (S11) is -22dB but return loss is still good at radius of patch 21.5mm with increasing gain. Modelling was done using backpropagation algorithm (KBNN) and simulations were done using HFSS.
Publicaion 2
Design and analysis of a Ѱ-Shape Micro-strip Patch Antenna for Wireless communication devices such as base stations
Publisher: IEEE DIGITAL LIBRARY
Volume: 978-1-4799-7678-2/15/$31.00 © 2015 IEEE
ISBN:
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
In this paper, a novel Ѱ-shape microstrip patch antenna that provides wide-impedance bandwidth performance in addition to the acceptable radiation patterns is presented. The substrate is a microwave substrate backed by a foam material, and for ease of fabrication, the patch is etched on a thin dielectric layer, which is placed over the microwave substrate and fed by a coaxial probe. The measured and simulated radiation patterns are in acceptable agreement.
In this paper, a novel Ѱ-shape microstrip patch antenna that provides wide-impedance bandwidth performance in addition to the acceptable radiation patterns is presented. The substrate is a microwave substrate backed by a foam material, and for ease of fabrication, the patch is etched on a thin dielectric layer, which is placed over the microwave substrate and fed by a coaxial probe. The measured and simulated radiation patterns are in acceptable agreement.
Publicaion 3
Finding Optimal Feed Location of a Microstrip Patch Antenna using HFSS
Publisher: IJIREEICE
Volume: vol 2 issue 11 nov2014
ISBN: ISSN (Print): 2321 – 5526
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
Microstrip patch antennas represent one family of compact antennas that offer a conformal nature and the capability of ready integration with communication system’s printed circuitry. In this paper, a microstrip antenna has been designed at 1.9GHz using ANSOFT-HFSS. By varying the feed point, good value of return loss is obtained and optimum position of feed point and the bandwidth are also determined.
Microstrip patch antennas represent one family of compact antennas that offer a conformal nature and the capability of ready integration with communication system’s printed circuitry. In this paper, a microstrip antenna has been designed at 1.9GHz using ANSOFT-HFSS. By varying the feed point, good value of return loss is obtained and optimum position of feed point and the bandwidth are also determined.
Publicaion 4
raining Back Propagation Algorithm to Design Microstrip Patch Antenna
Publisher: IJAESR
Volume: olume 1, Issue 7, Nov-2014
ISBN: ISSN(PRINT) 2349-4824
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
This paper discuss about the training of back propagation algorithm for designing a micro strip patch antenna. Here we have taken the design parameters of a patch antenna and calculated resonant frequency. Then we trained back propagation algorithm to calculate resonant frequency by giving the patch parameters as inputs to the algorithm. We compared calculated, trained and tested data frequencies and a good agreement is obtained between them.
This paper discuss about the training of back propagation algorithm for designing a micro strip patch antenna. Here we have taken the design parameters of a patch antenna and calculated resonant frequency. Then we trained back propagation algorithm to calculate resonant frequency by giving the patch parameters as inputs to the algorithm. We compared calculated, trained and tested data frequencies and a good agreement is obtained between them.
Publicaion 5
Dual-Band Annular-Ring Microstrip Patch Antenna for Satellite Applications
Publisher: American Journal of Engineering Research
Volume: Volume-03, Issue-08 (AUG-2014)
ISBN: ISSN: 2320-0847
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
A dual-band circularly polarized antenna fed by four apertures that covers the bands of GPS, Galileo, is introduced. The ARSAs designed using FR4 substrates in the L and S bands have 3-dB axial-ratio bandwidths (ARBWs) of as large as 37% and 52%, respectively, whereas the one using an RT5880 substrate in the L band, 61%. In these 3-dB axial-ratio bands, impedance matching with VSWR<=1.8 is also achieved. Three wideband planar baluns are used to achieve good axial ratio and VSWR. The results of the annular-ringmicrostrip antenna show good performance of a dual-band operation, which meets the requirement of Global Navigation Satellite System (GNSS) applications.
A dual-band circularly polarized antenna fed by four apertures that covers the bands of GPS, Galileo, is introduced. The ARSAs designed using FR4 substrates in the L and S bands have 3-dB axial-ratio bandwidths (ARBWs) of as large as 37% and 52%, respectively, whereas the one using an RT5880 substrate in the L band, 61%. In these 3-dB axial-ratio bands, impedance matching with VSWR<=1.8 is also achieved. Three wideband planar baluns are used to achieve good axial ratio and VSWR. The results of the annular-ringmicrostrip antenna show good performance of a dual-band operation, which meets the requirement of Global Navigation Satellite System (GNSS) applications.
Publicaion 6
Gain and Bandwidth Enhancement of a Circular Microstrip Patch Antenna with an Air Dielectric between Two Substrates
Publisher: IEEE DIGITAL LIBRARY
Volume: 978-1-4799-3267-2/13/$31.00 © 2013 IEEE
ISBN:
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
This paper describes the circular microstrip antenna with an air gap between two substrates and ground plane using the cavity model theory. The gain and bandwidth improvement is achieved using an air dielectric between two substrates. The microstrip patch antenna was fed by line with an air dielectric between two substrates. The gain of this antenna was 2.39 dB greater and bandwidth was 1.35% greater than that of a conventional circular patch antenna. The method of computation uses MOM and this is enabled by FEKO software.
This paper describes the circular microstrip antenna with an air gap between two substrates and ground plane using the cavity model theory. The gain and bandwidth improvement is achieved using an air dielectric between two substrates. The microstrip patch antenna was fed by line with an air dielectric between two substrates. The gain of this antenna was 2.39 dB greater and bandwidth was 1.35% greater than that of a conventional circular patch antenna. The method of computation uses MOM and this is enabled by FEKO software.
Publicaion 7
Resonant Frequency Calculation of Circular Ring Microstrip Patch Antenna Using Knowledge Based Neural Network
Publisher: IEEE DIGITAL LIBRARY
Volume: 10.1109/ECS.2014.6892539
ISBN:
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND Dr.D.C.PANDA
Description:
This paper discuss about application of knowledge based neural network to calculate resonant frequency of circular ring microstrip patch antenna. Results obtained using present approach are compared with that of traditional neural network, IE3D and measurement.
This paper discuss about application of knowledge based neural network to calculate resonant frequency of circular ring microstrip patch antenna. Results obtained using present approach are compared with that of traditional neural network, IE3D and measurement.
Publicaion 8
Enhancement of Bandwidth for Miniaturized Slot Antennas Using Folded Structure
Publisher: International Journal of Applied Engineering Research
Volume: Volume 6, Number 18 (2011)
ISBN: ISSN 0973-4562
Date of Publish: 0000-00-00
Author: TVS DIVAKAR
Description:
Folded structure is considered as the effective approach to increase the bandwidth of miniaturized antennas. A folded realization of a previously reported miniaturized slot antenna is devised and shown to provide more than 100% increase in the bandwidth as compared with that of the miniaturized slot antenna with the same size and efficiency.
Folded structure is considered as the effective approach to increase the bandwidth of miniaturized antennas. A folded realization of a previously reported miniaturized slot antenna is devised and shown to provide more than 100% increase in the bandwidth as compared with that of the miniaturized slot antenna with the same size and efficiency.
Publicaion 9
A Light Weight Microstrip Array Feed for LMS Reflector Antennas
Publisher: INTERNATIONAL CONFERENCE
Volume:
ISBN:
Date of Publish: 0000-00-00
Author: TVS DIVAKAR AND ABINASH GAYA,Enhancement of Bandwidth for Miniaturized Slot Antennas Using Folded Structure,International Journal of Applied Engineering Research ISSN 0973-4562 RESEARCH INDIA PUBLICATIONS p-p 2232-2235
Description:
A 1-2GHz (L-band) circularly polarized microstrip array antenna with relatively wide bandwidth is proposed. The array has seven subarrays which form a single cluster as part of a large overlapping cluster reflector feed array. Each of the seven subarrays consists of four uniquely arranged linearly polarized microstrip elements. A VSWR of 3.0 indicates about 75% of the power is delivered to the antenna (1.25 dB of mismatch loss); a VSWR of 7.0 indicates 44% of the power is delivered to the antenna (3.6 dB of mismatch loss).
A 1-2GHz (L-band) circularly polarized microstrip array antenna with relatively wide bandwidth is proposed. The array has seven subarrays which form a single cluster as part of a large overlapping cluster reflector feed array. Each of the seven subarrays consists of four uniquely arranged linearly polarized microstrip elements. A VSWR of 3.0 indicates about 75% of the power is delivered to the antenna (1.25 dB of mismatch loss); a VSWR of 7.0 indicates 44% of the power is delivered to the antenna (3.6 dB of mismatch loss).
Other Publicaion
Description:
A 1-2GHz (L-band) circularly polarized microstrip array antenna with relatively wide bandwidth is proposed. The array has seven subarrays which form a single cluster as part of a large overlapping cluster reflector feed array. Each of the seven subarrays consists of four uniquely arranged linearly polarized microstrip elements. A VSWR of 3.0 indicates about 75% of the power is delivered to the antenna (1.25 dB of mismatch loss); a VSWR of 7.0 indicates 44% of the power is delivered to the antenna (3.6 dB of mismatch loss).
A 1-2GHz (L-band) circularly polarized microstrip array antenna with relatively wide bandwidth is proposed. The array has seven subarrays which form a single cluster as part of a large overlapping cluster reflector feed array. Each of the seven subarrays consists of four uniquely arranged linearly polarized microstrip elements. A VSWR of 3.0 indicates about 75% of the power is delivered to the antenna (1.25 dB of mismatch loss); a VSWR of 7.0 indicates 44% of the power is delivered to the antenna (3.6 dB of mismatch loss).