Open Access Open Access  Restricted Access Subscription or Fee Access

Detailed Analysis of a Novel Fractal Monopole Antenna for UWB Applications with Notches for WLAN Rejection Using Two Different Approaches

(*) Corresponding author

Authors' affiliations



In this paper, a novel fractal monopole antenna is analyzed in details. Initially, the basic generator structure is designed in which the effect of using different grounds is studied. A 50 ohm microstrip feed having width 3 mm is used to excite the antenna. The basic generator antenna exhibits a wide bandwidth of 10.24 GHz between 3.31 GHz to 13.55 GHz. The antenna shows stable radiation patterns at different frequencies within the UWB frequency range. The later part of the paper is mainly concerned with the final iteration of the basic generator structure. The final novel antenna has a bandwidth of 11 GHz in the frequency range of 3.4 GHz-14.4 GHz. Moreover two different methods are adopted for rejecting WLAN frequency band: A) an inverted U shaped structure with appropriate dimension is etched out from the patch to realize a stop band between 4.87 GHz to 5.89 GHz B) In this case a similar kind of inverted U shape structure having thickness 0.2mm is inserted in the microstrip feed in order to obtain a notch between 4.8 GHz to 6.6 GHz. Effect of variation of the strip width as well as different dielectrics is analyzed in details. The final antenna also exhibits stable radiation patterns at different frequencies within the UWB range. The measured results are in well agreement with the simulated results. All the designs and analysis is carried out in HFSS 14.
Copyright © 2017 Praise Worthy Prize - All rights reserved.


UWB Technology; Fractal; Monopole Antenna;Return Loss; Gain

Full Text:



FCC: “ FCC 1st report and order on ultrawideband technology” Washington, DC, 2002.

Zaker R. and Abdipour A.,“ Bandwidth enhancement and miniaturization of fork-shaped monopole antenna,” IEEE Antennas and Wireless Propagation Letters, vol. 10, pp. 697-700, 2011.

Koohestani M. and Golpour M., “U-shaped microstrip patch antenna with novel parasitic tuning stubs for ultra wideband applications ,”IET Microw. Antennas Propag., vol. 4, pp. 938-946, 2010.

Sun M., Zhang Y.P. and Lu Y., “Miniaturization of planar monopole antenna for ultrawideband radios,” IEEE Trans. Antennas Propag., vol. 58, no. 7, pp 2420-2425, 2010.

Werner D.H., Haupt R.L., and Werner P.L., “Fractal antenna engineering: the theory and design of fractal antenna arrays ,” IEEE Antennas Propag. Mag., vol. 41, no. 5, pp. 37-58, 1999.

Anguera J., Puente C., Borja V. and Soler J., “Fractal-shaped antennas: a review,” Wiley Encycl. RF Microw. Eng., vol. 2, pp. 1620-1635, 2005.

Haji-Hashemi M.R., Mir-Mohammad Sadeghi M. and Moghtadai, V.M., “ Space-fiiling patch antennas with CPW feed,” Progress in Electromagnetic Research Symp., 2006.

A. Falahati, M. Naghshvarian-Jahromi and R. M. Edwards, “ Bandwidth enhancement and decreasing ultra-wideband pulse response distortion of Penta-Gasket-Koch monopole antennas using compact –grounded coplanar waveguides,” IET Microwaves, Antennas &Propagation, 2010.

Deepti Das Krishna, Anupam R Chandran and C.K. Aanandan, “ A Compact Dual Frequency Antenna with Sierpinski Gasket Based Slots,” Proceedings of the 10th European Conference on Wireless Technology, 2007.

D. D. Krishna, M. Gopikrishna, C.K. Aanandan, P. Mohanan and K. Vasudevan, “ Compact Wideband Koch fractal printed slot antenna,” IET Microw. Antennas Propag., vol. 3, no. 5, pp. 782-789,2008.

M.A.M Yusop, M.K.A Rahim, M.F. Ismail and A.Wahid, “Circular Polarization Fractal Koch Microstrip Patch Antenna using Single-fed EM Coupled Ring Resonators,” Proceedings of 2010 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE), 2010.

K.S.Ryu and A.A.Kishk, “UWB antenna with single or dual band notched for lower WLAN band and upper WLAN band,” IEEE Trans. Antennas Propag.,vol. 57, no.12, pp.3942-3950, 2009.

H.W.Liu, C.H.Ku,T.S.Wang and C.F. Yang, “Compact monopole antenna with band-notched characteristics for UWB application,” IEEE Antennas Wireless Propag. Lett.,vol.9, pp.397-400, 2010.

K.H.Kim and S.O.Park, “Analysis of small band-rejected antenna with parasitic strip for UWB,” IEEE Trans. Antennas Propag.,vol.54, no.6, pp. 1688-1692, 2006.

W.T.Li, X.W.Shi and Y.O.Hei, “Nonel planar UWB monopole antenna with triple-notched characteristics,” IEEE Antennas Wireless Propag. Lett.,vol.8,pp. 1094-1098, 2009.

S.K.Mishra, R.Gupta, A.Vaidya and J. Mukherjee, “ Printed fork shaped dual band monopole antenna for Bluetooth and UWB applications with 5.5 GHz WLAN Band Notched Characteristics,” Progress In Electromagnetics Research C., vol. 22, pp.195-210, 2011.

Rezaul Azim, Mohammad Tariqul Islam and Ahmed Toaha Mobasher, “Dual Band-Notch UWB Antenna With Single Tri-Arm Resonator,” IEEE Antennas Wireless Propag. Lett., vol. 13, pp. 670-673, 2014.

Noor Mohammad Awad and Mohammad K Abdelazeez, “Bluetooth/UWB circular patch with dual band notches,” IEEE Jordan Conference on Applied Electrical Engineering and Computing Technolofies (AECCT), 2013.

Indranil Acharya, Akash Singh Chauhan and Snehanshu Sengupta, “Gain enhancement of MEMS helix antenna using double substrae and fractal structures ,”IEEE 2nd International Conference on Electronics and Communication Systems (ICECS), 2015.

Shrivishal Tripathi, Akhilesh Mohan and Sandeep Yadav, “ Hexagonal fractal ultra-wideband antenna using Koch geometry with bandwidth enhancement,” IET Microw. Antennas Propag., vol. 8, no. 15, pp.1445-1450,2014.


  • There are currently no refbacks.

Please send any question about this web site to
Copyright © 2005-2024 Praise Worthy Prize