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Wideband compact msa using finite ground

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Wideband compact msa using finite ground

  1. 1. International Journal of Electronics and Communication Engineering & Technology (IJECET), INTERNATIONAL JOURNAL OF ELECTRONICS AND ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online), Special Issue (November, 2013), © IAEME COMMUNICATION ENGINEERING & TECHNOLOGY (IJECET) ISSN 0976 – 6464(Print) ISSN 0976 – 6472(Online) Special Issue (November, 2013), pp. 110-114 © IAEME: www.iaeme.com/ijecet.asp Journal Impact Factor (2013): 5.8896 (Calculated by GISI) www.jifactor.com IJECET ©IAEME Wideband Compact MSA using Finite Ground Alok Agarwal1, P K Singhal2 1Shri Jagdish Prasad Jhabarmal Tibrewala University Vidyanagari, Jhunjhunu, Rajasthan, India, of Electronics, Madhav Institute of Technology & Science, Gwalior, M.P., India, 2Department 1alokagarwal26@yahoo.com, 2pks_65@yahoo.com ABSTRACT: Compact microstrip patch antenna using finite ground is proposed in this paper for wide band operation. Modified square shape microstrip patch antenna using finite ground plane is used to achieve wideband by corner cut and inserting slits inside the edges of the radiating patch. The obtained impedance bandwidth for 10 dB return loss is coming out to be 37.47 % (1630 MHz) of the center frequency at 4.35 GHz. Compact size and wide bandwidth of this antenna is practically applicable for the wireless communication systems. KEYWORDS: Bandwidth, finite ground, impedance loci, return loss, wideband. I. INTRODUCTION Conventional microstrip patch antenna in general have a conducting patch printed on a grounded substrate and have the attractive features of low profile, light weight, easy fabrication and conformability to mounting. However, microstrip antennas inherently have a narrow bandwidth and bandwidth enhancement is usually demanded for practical applications in wireless communication. The size reduction and bandwidth enhancement are major design considerations for practical applications of microstrip antenna. For this reason, studies to achieve compact and broad band operations of microstrip antennas have greatly increased [4]. Microstrip patch antennas are widely implemented in many commercial applications of wireless communication. Microstrip patch antennas are manufactured using printed circuit technology, so that mass production can be achieved at a low cost. Compact microstrip patch antennas have recently received much attention due to the increasing demand of small antennas for mobile and wireless communications equipment. For achieving microstrip antennas with a reduced size at a fixed operating frequency, the use of a high-permittivity substrate is an effective method. By using finite ground plane the impedance bandwidth and antenna efficiency can be enhanced. The antenna’s ground plane can be meandered by inserting several meandering slits at its edges or slot can be introduced at the ground plane. The obtained impedance bandwidth for a compact design with a meandered ground plane can be greater than that of the corresponding conventional microstrip antenna [3]. The electromagnetic simulation of the proposed antenna has been carried out using IE3D International Conference on Communication Systems (ICCS-2013) B K Birla Institute of Engineering & Technology (BKBIET), Pilani, India October 18-20, 2013 Page 110
  2. 2. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online), Special Issue (November, 2013), © IAEME software of Zeland software. Return loss, smith chart, directivity, efficiency etc. are being evaluated using IE3D software. II. ANTENNA DESIGN AND RESULTS In this patch antenna design, an effort has been made to enhance the bandwidth due to modified square micro strip patch antenna with square slot loaded finite ground plane. The 50ohm coaxial cable with SMA connector is used for feeding the microstrip patch antenna. Fig. 1 shows the front view of modified square microstrip patch antenna with slot loaded finite ground plane of antenna design. In this antenna design, with center frequency f0 = 4.35 GHz within the frequency range 1 GHz to 6 GHz, step frequency = 0.01 GHz, In this modified square patch antenna design, length of patch L = 30 mm, width of patch W = 30 mm, with slot loaded finite ground plane of the dimension L = 45 mm and W = 45 mm and square slot of dimensions 10 mm × 10 mm at the centre position, feed point locations at the patch is (10.85,-12). Fig. 2 shows the back view of modified square patch antenna with slot loaded finite ground plane of antenna design. Fig. 3 shows the variation of return loss with frequency for antenna design; the impedance bandwidth is taken from the 10-dB return loss. Fig. 4 shows the variation of directivity (in dBi) with frequency for antenna design. Fig. 5 shows the variation of efficiency with frequency for antenna design. Fig. 6 shows the radiation pattern for antenna design at the center frequency 4.35 GHz. Fig. 7 shows the Impedance loci (Smith chart) for antenna design. At resonance frequency 4.35 GHz, the simulated input impedance of antenna is in good agreement with the 50 ohms impedance. Here due to modified square micro strip patch antenna with finite ground plane of this antenna design; the impedance bandwidth, determined from the 10-dB return loss, is coming out to be 37.47 % (1630 MHz) of the center frequency at 4.35 GHz. Bandwidth for the proposed antenna design is sufficiently high and other radiation characteristics are also satisfactory. Fig. 1: Front view of modified square microstrip patch antenna with slot loaded finite ground International Conference on Communication Systems (ICCS-2013) B K Birla Institute of Engineering & Technology (BKBIET), Pilani, India October 18-20, 2013 Page 111
  3. 3. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online), Special Issue (November, 2013), © IAEME Fig. 2: Back view of modified square microstrip patch antenna with slot loaded finite ground Fig. 3: Variation of return loss with frequency for proposed antenna design Fig. 4: Variation of directivity with frequency for proposed antenna design International Conference on Communication Systems (ICCS-2013) B K Birla Institute of Engineering & Technology (BKBIET), Pilani, India October 18-20, 2013 Page 112
  4. 4. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online), Special Issue (November, 2013), © IAEME Fig. 5: Variation of Efficiency with frequency for proposed antenna design. Fig. 6: Radiation Pattern for antenna design at center frequency f0 = 4.35 GHz Fig. 7: Impedance loci for proposed antenna design International Conference on Communication Systems (ICCS-2013) B K Birla Institute of Engineering & Technology (BKBIET), Pilani, India October 18-20, 2013 Page 113
  5. 5. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online), Special Issue (November, 2013), © IAEME III. CONCLUSION The simulation result of the proposed antenna has been carried out by using IE3D software. For modified square shape microstrip patch antenna using finite ground, by corner cut and inserting slits inside the edges of the radiating patch, the obtained impedance bandwidth for 10 dB return loss is coming out to be 37.47 % (1630 MHz) of the center frequency at 4.35 GHz, other radiation characteristics are also optimized, which is very good agreement for wireless communication systems. REFERENCES [1] Milligan, T. A., “Modern Antenna Design”, John Wiley & Sons, Hoboken, New Jersey, 2005. [2] Garg, R., P. Bhartia, I. Bahl, and A. Ittipiboon, “Microstrip Antenna Design Handbook”, Artech House, Boston, London, 2001. [3] Wong, K. L., “Compact and Broadband Microstrip Antenna”, John Wiley & Sones, New York, 2002. [4] Kumar, G. and K. P. Ray, “Broadband Microstrip Antennas”, Artech House, USA, 2003. [5] Pozar, D.M. and D.H.Schaubert, Microstrip Antennas: The Analysis and Design of Microstrip Antennas and Arrays, New York: IEEE Press, 1995. [6] C.A.Balanis, Antenna Theory Analysis and Design. 3rd ed., Hoboken, New Jersey: Wiley, 2005 [7] Ray, K. P., S. Ghosh, and K. Nirmala, “Multilayer multi resonator circular microstrip antennas for broadband and dualband operations,” Microwave and Optical Technology Letters, Vol. 47, No. 5, 489–494, Dec. 2005. [8] Ghassemi, N., M. H. Neshati, and J. Rashed-Mohassel, “A multilayer multiresonator aperture coupled microstrip antenna for ultra wideband operations,” Proc. IEEE Applied Electromagnetic Conference 2007, Kolkata, India, December 19–20, 2007. [9] Zehforoosh, Y., C. Ghobadi, and J. Nourinia, “Antenna design for ultra wideband applications using a new multilayer structure,” PIER Online, Vol. 2, No. 6, 544–549, 2006. [10] Kim, T., J. Choi, and J. S. Jeon, “Design of a wideband microstrip array antenna for PCS and IMT-2000 service,” Microwave and Optical Technology Letters, Vol. 30, No. 4, 261–265, Aug. 2001. BIOGRAPHY Alok Agarwal received his B.Tech degree in Electronics from Bhilai Institute of Technology, Durg, Raipur University, India, in 1996, M.Tech degree in Digital Communication from U.P. Technical University, Lucknow, India, in 2009. Presently he is working as an Associate Professor in the Department of Electronics and Communication Engineering, Lingaya’s University, Faridabad, India. He is having total experience of more than 15 years in teaching Electronics and Communication Engineering. His research interest includes digital communication, microwave communication etc. Presently, he is pursuing PhD from JJT University, Jhunjhunu, Rajasthan, India. He is engaged in increasing the bandwidth of a microstrip patch antenna using different design considerations, which is very much demanding in mobile and wireless communications. International Conference on Communication Systems (ICCS-2013) B K Birla Institute of Engineering & Technology (BKBIET), Pilani, India October 18-20, 2013 Page 114

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