Wireless and Mobile Technologies

ISSN (Print): 2374-2119

ISSN (Online): 2374-2127

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Website: http://www.sciepub.com/journal/WMT

   

Article

An Improved Compact & Multiband Fractal Antenna Using the Koch Curve Geometry

1Deparment of ELTCE, VSSUT, Burla, Odisha, India

2BIT, Durg, Chhatisgadh, India


Wireless and Mobile Technologies. 2014, 2(1), 1-6
doi: 10.12691/wmt-2-1-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
Manas Ranjan Jena, B.B. Mangaraj, Rajiv Pathak. An Improved Compact & Multiband Fractal Antenna Using the Koch Curve Geometry. Wireless and Mobile Technologies. 2014; 2(1):1-6. doi: 10.12691/wmt-2-1-1.

Correspondence to: Manas  Ranjan Jena, Deparment of ELTCE, VSSUT, Burla, Odisha, India. Email: manas.synergy@gmail.com

Abstract

In this paper, we have achieved an compact & multiband fractal antenna using a Koch curve geometry. The simulation of the proposed antenna is done by CST Microwave Studio EM simulation software. The proposed Koch curve fractal antenna proves that it is capable to create multiband frequencies. The proposed fractal antenna is designed on FR-4 substrate with ℇr= 4.4. The antenna is fed with the probe feed method. We got two resonant frequencies like 32.84GHz & 34.28GHz which shows multiband characteristics. Simulated results shows that the return loss is better than 15 dB, the VSWR is less than 1.3, the directivity is greater than 6dBi & the gain is more than 6dB in each band. So this fractal antenna can be suitable for the radio astronomy & space research applications.

Keywords

References

[1]  Balanis, Constantine, “Antenna theory-Analysis and Design”, John Wiley & Sons Ltd, Reprinted 2008.
 
[2]  B. B. Mandelbrot, “The Fractal Geometry of Nature” San Francisco, CA: Freeman, 1983.
 
[3]  N. Cohen, “Fractal Antenna Application In Wireless Telecommunications” Proceedings of Electronics Industries Forum of New England, 1997, pp. 43-49.
 
[4]  R.M. Crownover, “Introduction to Fractals and Chaos, Boston”, MA Jones & Bartlett, 1995.
 
[5]  D. H. Werner, P. L. Werner, and K. H. Church, “Genetically engineered multi-band fractal antennas,Electron. Lett., vol. 37, no. 19, pp. 1150-1151, Sep. 2001.
 
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[6]  B. Manimegalai, S. Raju, & V. Abhaikumar, “A multi fractal cantor antenna for multiband wireless applications,” IEEE Antennas Wireless Propag. Lett., vol. 8, pp. 359-362, 2009.
 
[7]  D. H. Werner and S. Ganguly, “An overview of fractal antenna engineering research,” IEEE Antennas Propag. Mag., vol. 45, no. 1, pp. 38-57, Feb. 2003.
 
[8]  K. J. Vinoy, “Fractal Shaped Antenna Elements for Wide and Multi-Band Wireless Applications” Thesis, Pennsylvania, Aug. 2002.
 
[9]  Best S.R. “The Effectiveness of Space Filling Fractal Geometry in Lowering Resonant Frequency”, Antennas & Propagation Letters, Vol. 1, (2002), 112-115.
 
[10]  X. Yang, J. Chiochetti, D. Papadopoulos, and L. Susman, “Fractal antenna elements and arrays,” Appl. Microw. Wireless, vol. 5, no. 11, pp. 34-46, May 1999.
 
[11]  Puente, C., Romeu, J., and Cardama, A. (2000). “The Koch Monopo le: A Small Fractal Antenna”. IEEE Transactions On Antennas And Propagation 48 (11).
 
[12]  Best, S.R. (2002). “On the resonant properties of the Koch fractal and other wire monopole antennas”. IEEE Antennas and Wireless Propagation Letters. 1 (1).
 
[13]  Vinoy, K. J., Abraham, J.K., and Varadan, V.K. (2003). “Fractal dimension & frequency response of fractal shaped antennas”. IEEE Antennas &Propagation Society International Symposium. 22-27 June. Volume 4, 222-225.
 
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Article

Design & Analysis of a Novel Rectangular Microstrip Patch Antenna with Improved Performance Using MATLAB for Pervasive Wireless Applications

1B.Tech 4th Year, Dept. of ETC, SIET, Dhenkanal, Odisha, India

2Asst. Prof. Dept. of ETC, SIET, Dhenkanal, Odisha, India


Wireless and Mobile Technologies. 2014, 2(1), 7-11
doi: 10.12691/wmt-2-1-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Nishant Kumar, Ashutosh Kumar Pandey, Aditya Prakash, Shiv Mani Kumar, Rupali Bihari, Manas Ranjan Jena. Design & Analysis of a Novel Rectangular Microstrip Patch Antenna with Improved Performance Using MATLAB for Pervasive Wireless Applications. Wireless and Mobile Technologies. 2014; 2(1):7-11. doi: 10.12691/wmt-2-1-2.

Correspondence to: Manas  Ranjan Jena, Asst. Prof. Dept. of ETC, SIET, Dhenkanal, Odisha, India. Email: manas.synergy@gmail.com

Abstract

In this paper, we have achieved an efficient rectangular patch antenna with optimized parameters by using MATLAB. The proposed antenna is a type of radio antenna with a low profile which is mounted on a flat surface. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. A resonant frequency of 3 GHz is achieved with improved parameters like high return loss, Low VSWR, High directivity & gain, High efficiency. So the proposed antenna can be suitable for the radio astronomy & space research applications.

Keywords

References

[1]  J R James & P S Hall, “Handbook of Microstrip Antennas”, Peter Peregrinus Ltd, UK, 1989.
 
[2]  Balanis, Constantine, “Antenna theory-Analysis and Design”, John Wiley & Sons Ltd, Reprinted 2008.
 
[3]  I. J. Bahl and P. Bhartia, “Microstrip Antennas”, Artech House, Deldham, MA, 1980.
 
[4]  D.M. Pozar, “Microstrip Antennas,” Proc. IEEE, Vol. 80, No. 1, pp. 79-81, January 1992.
 
[5]  C. A. Balanis, “Advanced Engineering Electromagnetics”, John Wiley & Sons, New York, 1989.
 
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[6]  E.O. Hammerstad, “Equations for Microstrip Circuit Design,” Proc. Fifth European Microwave Conf., pp. 268-272, September 1975.
 
[7]  K. R. Karver and J. W. Mink. “Microstrip Antenna Technology,” IEEE Trans. Antennas Propagat., Vol. AP-29, No. 1. Pp. 2-24, January 1981.
 
[8]  S L Mallikarjun, P M Hadalgi, “Single layer modified Rectangular Microstrip array Antenna for multiband & wideband applications”, Indian Journal of Radio & Space Physics, Vol 39, June 2010, PP 156-162.
 
[9]  Shiv Charan Puri & M.G.Tiary, A Novel Quad Band Rectangular Microstrip Patch Antenna for Wireless Applications”, International Symposium on Devices MEMS, Intelligent Systems & Communication (ISDMISC) 2011.
 
[10]  Devdutt Sharma1 & Laxmi Shrivastava, “Design And Analysis of Co-Planar Wideband Microstrip Slot Antenna Using MATLAB”, IJETAE, Volume 3, Issue 6, June 2013.
 
[11]  Md. Maruf Ahamed, Kishore Bhowmik & Md. Shahidulla, “Rectangular Microstrip Patch Antenna at 2GHZ on Different Dielectric Constant for Pervasive Wireless Communication”, IJECE, Vol. 2, No. 3, June 2012, pp. 417-424.
 
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Article

Influence of Age and Training on Planning Instruction Using Mobiles Phones by Pre-service Social Studies Teachers

1University of Ibadan, Nigeria


Wireless and Mobile Technologies. 2016, 3(1), 1-6
doi: 10.12691/wmt-3-1-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
Gloria Adedoja, Abimbade Oluwadara. Influence of Age and Training on Planning Instruction Using Mobiles Phones by Pre-service Social Studies Teachers. Wireless and Mobile Technologies. 2016; 3(1):1-6. doi: 10.12691/wmt-3-1-1.

Correspondence to: Gloria  Adedoja, University of Ibadan, Nigeria. Email: sadedoja@yahoo.com

Abstract

Effective planning of instruction enables the teacher to set out different strategies that can make both teachers and students achieve stated objectives. Teachers are expected to put a lot of effort into planning their instruction, and with the emergence of different technologies (hardware/software), planning can be done with considerable ease. These technologies such as computers, mobile phones, tablets, Personal Digital Assistants (PDAs) and so on create a platform for teachers to explore, gather facts, sort, edit and re-arrange information about a topic before teaching it. Therefore, in this study, pre-service social studies teachers were trained on how to plan instruction using the Mobiles, this was done using a Mobile Learning Lesson Plan (MLLP) template, the influence of age on how pre-service teachers plan instructions using mobiles was also examined. The template is a blueprint of what is to be taught using the mobile phone, it enables teachers to organise, plan, design, and evaluate the lesson effectively. The results show that after the training, the pre-service social studies teachers were able to acquire requisite skills to plan instruction using mobile phones. Also, age does not significantly influence on the ability of pre-service social studies teachers to plan instruction using mobiles.

Keywords

References

[1]  Abimbade, A. and Balogun, T.A. (2007), TEE 353: Introduction to Instructional Technology, Distance Learning Centre, University of Ibadan, Oyo State. Nigeria.
 
[2]  Aduwa-Ogiegbaen, S.E. and Iyamu, E.O.S. (2016). Factors affecting quality of English language teaching and learning in secondary schools in Nigeria. Project Innovation (Alabama). 40.3.
 
[3]  Akcaoğlu M. (2008). Exploring technology integration approaches and practices of pre-service and in-service English language teachers. A Thesis Submitted to the Graduate School of Social Sciences of Middle East Technical University. http://etd.lib.metu.edu.tr/upload/12612234/index.pdf.
 
[4]  Attewell, J., Savill-Smith, C., and Douch, R., (2009). The Impact of Mobile Learning: Examining what it means for Teaching and Learning. Published by LSN. www.lsnlearning.org.uk retrieved on 16-1-2014.
 
[5]  Azuka, B. F. (2016). Activity -Based Learning Strategies in the Mathematics Classrooms. Journal of Education and Practice, 4.13
 
Show More References
[6]  Bautista, C. (2013). 73% of teachers use cell phone for classroom activities. http://mashable.com/2013/02/28/teachers-technology/ retrieved on 16-10-2014.
 
[7]  Breivik, P. S. (2005). 21st Century learning and information literacy. Change 37.2:20-27.
 
[8]  Gibbons, S. (2007). Redefining the roles of Information professionals in Higher education to Engage the Net Generation. Paper presented at EDUCAUSE, Australasia. http://www.caudit.edu.au/educauseaustralasia07/authors_papers/Gibbons2.pdf retrieved on 16-10-2014.
 
[9]  Helsper, E. and Eynon, R. (2009). Digital natives: where is the evidence? British educational research journal. 1-18.
 
[10]  Levert, G. 2006. Designing for Mobile Learning: Clark and Mayer's Principles Applied. http://www.learningsolutionsmag.com/articles/222/designing-for-mobile-learning-clark-and-mayers-principles-applied.
 
[11]  Mobile Learning Academy (2014).
 
[12]  Nasser, R. (2014). Using mobile device to increase student academic outcomes in Qatar. Open Journal of Social Sciences, 2014, 2, 67-73.
 
[13]  Olofinniyi, O., Fashiku C., Fashiku B., Owombo P. (2012). Access to GSM and Students’ Academic Performance in Secondary School of Osun State, Nigeria. Online Journal of Social Sciences Research.
 
[14]  Ophir, E., Nass, C. and Wagner, A. D. (2009). Cognitive control in media multitaskers. Proceedings of the National Academy of Sciences of the United States of America, 106.37:15583-15587.
 
[15]  Pouliot, C. (2006). Instructional Planning and Assessment, chapter 3, retrieve in https://www.google.com.ng/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0 ahUKEwjTuMqj4a3LAhWE8Q4KHbFzAfwQFggeMAE&url=http%3A%2F%2Fhighered.mheducation. com%2Fsites%2Fdl%2Ffree%2F0070959668%2F405859%2FAirasian_88697_ch03.pdf&usg= AFQjCNFntd-2e3kpVU7wN3-eU2k4771VJA.
 
[16]  Prensky, M. (2001). Digital natives, digital immigrants. On the Horizon, 9(5), p. 1-2.
 
[17]  Rainie, L. (2006). Life online: Teens and technology and the world to come. online at, http://www.pewInternet.org/ppt/Teens%20and%20technology.pdf.
 
[18]  Sharples, M; Milrad, M; Arnedillo S, Inmaculada; Vavoula, G. (2009). Mobile Learning: ‹Small devices, big Issues.› In Nicolas Balacheff, Sten Ludvigsen, Ton de Jong, Ard Lazonder & Sally Barnes (eds.), Technology Enhanced Learning: Principles and Products. Heidelberg: Springer, pp. 233-249.
 
[19]  Shih, J.-L., Chuang, C.-W. and Hwang, G.-J. (2010). An Inquiry-based Mobile Learning Approach to Enhancing Social Science Learning Effectiveness. Educational Technology and Society 13.4:50-62.
 
[20]  Southall G. 2012; The Union City story. New York: Education Development Center, Center for Children and Technology.
 
[21]  Wiersma, W. (2011). Digital natives: mythical tribe, or savvy youth of nowadays?. Wybowiersma. net. http://wybowiersma. net/pub/essays/Wiersma, Wybo.
 
[22]  Wu, C.-C., & Lai, C.Y. (2009). Wireless Handhelds to Support Clinical Nursing Practicum. Educational Technology & Society 12.2:190-204.
 
Show Less References