Tree shaped fractal antenna with multiband characteristics


  • B T P Madhav
  • V Subba Reddy
  • D Rajasekar Reddy
  • K Ravi Sankar
  • E V.S.Harsha Ramanujan
  • V V.Surya Prakash
  • M Venkateshwara Rao





Defected Ground Structure (DGS), Multiband, Fractal Antenna.


A tree shaped fractal antenna with U shaped slot and W-shaped slot has been designed and analyzed in this article by using ANSYS elec-tromagnetic desktop 17. The proposed antenna is analyzed taking FR4 substrate is taken as the substrate material. The proposed antenna exhibits multiband characteristics (2.75-3.17GHz, 4.1-4.8GHz, 5.1-5.3GHz and 5.4-6.3GHz, 7.21-12.8GHz) in the Ultra-wide band region. The path that is radiating by superposition of the rectangular patches and multiple-band operating frequency is obtained by increasing the U-shapes slots and w-shaped slot on the patch. The improvement in the impedance characteristics between the adjacent frequencies is achieved by using defected ground structure (DGS) on the ground plane as to cover the region of UWB application (3.1-10.6GHz). The proposed antenna works in the applications like Wi-Max, Weather forecasting RADAR systems and WLAN.



[1] Norfishah Ab Wahab, “Microstrip Rectangular 4x1 Patch Array Antenna at 2.5GHz for WiMAX Application,†IEEE computer society2010

[2] B. Sai Sandeep, “Design and simulation of microstrip patch array antenna for wireless communications at 2.4 GHz,†International Journal of Scientific & Engineering Research, Volume 3, Issue 11, November-2012

[3] Hsien-Wen Liu, Chia-Hao Ku, and Chang-Fa Yang, “Novel CPW-Fed Planar Monopole Antenna for WiMAX/WLAN Applications,†IEEE Antennas and Wireless Propagation

[4] Letters, Vol. 9, April 2010.

[5] H. Wang, X. B. Huang, D. G. Fang. A single layer wideband U slot microstrip patch antenna array. IEEE antennas and wireless propag. lett. 2008(7): 9~12.

[6] Shavit, R., Tzur, Y., and Spirtus, D, “Design of a new dualfrequency and dual-polarization microstrip elementâ€, IEEE Trans. Antennas Propag., vol 51, (7), pp. 1443–1451, July 2003

[7] Muhammad MahfuzulAlam, Md. Mustafizur Rahman Sonchoy, and Md. Osman Goni, "Design and Performance Analysis of Microstrip Array Antenna," Progress in Electromagnetics Research Symposium Proc., Aug. 2009, pp. 18-21

[8] Chen, H.-D., C.-Y.-D. Sim, J. Y. Wu, and T.-W. Chiu, Broadband high-gain microstrip array antennas for WiMAX base station," IEEE Trans. on Antennas and Propag., Vol. 60, 3977{3980, 2012.

[9] George Casu, “Design and Implementation of Microstrip Patch Antenna Array,†Military Technical Academy, Faculty of Electronics and Informatics, IEEE, 2014.

[10] J.J Xie, X.S. Ren, Y.Z. Yin, and S.L. Zuo, “Rhombic slot antenna design with a pair of straight strips and two U-shaped slots for WLAN/WiMAX applicationsâ€, Microwave and Optical Technology Letters, Vol. 54, no.6, pp. 1466-1469, 2012

[11] B. T. P. Madhav, Mounika Sanikommu, M. N. V. S. Pranoop, K. S. N. Manikanta Chandra Bose and B. Sriram Kumar, CPW Fed Antenna for Wideband Applications based on Tapered Step Ground and EBG Structure, Indian Journal of Science and Technology, ISSN: 0974-6846, Vol 8, Issue 9, May 2015, pp 119-127.

[12] ] T. G. Ma and S. K. Jeng, "Planar miniature tapered-slot- fed annular slot antennas for ultra-wideband radios," IEEE Trans. Antennas Propag., vol 53, pp. 1194-1202, Mar. 2005.

[13] M. V. Reddiah Babu, Sarat K. Kotamraju, B. T. P. Madhav, Compact Serrated Notch Band Mimo Antenna For Uwb Applications, Arpn Journal Of Engineering And Applied Sciences, Issn 1819-6608, Vol. 11, No. 7, April 2016, Pp 4358-4369.

[14] Yi-Cheng Lin and Kuan-Jung Hung, "Compact Ultrawideband Rectangular Aperture Antenna and Band-Notched Designs," IEEETrans. Antennas Propag., vol. 54, NO. 11, Nov. 2006

[15] K V L Bhavani, Habibulla Khan, D Sreenivasa Rao, B T P Madhav, Dual Band Notched Planar Printed Antenna with Serrated Defected Ground Structure, Journal of Theoretical and Applied Information Technology, ISSN: 1992-8645, Vol 88, Issue 1, June 2016, pp 28-34.

[16] A. Kerkhoof and H. Ling. "A parametric study of band-notched UWBplanar monopole antennas," IEEE Antenna PropagSocIntSymp Dig 2(2004), 1768-1771

[17] K V L Bhavani, Habibulla Khan, B T P Madhav, Wideband CPW Fed Monopole Fractal Antenna with Defected Ground Structure, Journal of Engineering and Applied Sciences, ISSN: 1816-949X, 2016, Vol 11, Issue 11, pp 2446-2454

[18] C. B. Dietrich, Jr., K. Dietze, J. R. Nealy, and W. L. Stutzman, “Spatial, polarization, and pattern diversity for wireless handheld terminals,†IEEE Trans. Antennas Propag., vol.49, no. 9, pp. 1271–1281, Sep.2001.

[19] D S Ramkiran, P Siddaiah, B T P Madhav, serrated circular fractal coplanar wave guide fed antennas for wideband and ultra-wideband applications, IJCTA, ISSN: 0974-5572, Vol 10, No 1, pp 259-266, 2017.

[20] B. Allen,M. Dohler, E. Okon,W. Q.Malik, A. K. Brown, and D. Edwards UWB Antenna and Propagation for Communications, Radar and Imaging. Hoboken, NJ, USA: Wiley, 2007.patients for six months. Journal of Clinical Nursing 16, 1082–1087.

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