Abstract
In this paper, a different method for designing an ultra-wideband (UWB) microstrip monopole antenna with dual band-notched characteristic has been presented. The main novelty of the proposed structure is the using of protruded strips as resonators to design an UWB antenna with dual band-stop property. In the proposed design, by cutting the rectangular slot with a pair of protruded T-shaped strips in the ground plane, additional resonance is excited and much wider impedance bandwidth can be produced. To generate a single band-notched function, we convert the square radiating patch to the square-ring structure with a pair of protruded step-shaped strips. By cutting a rectangular slot with the protruded Γ-shaped strip at the feed line, a dual band-notched function is achieved. The measured results reveal that the presented dual band-notched antenna offers a very wide bandwidth from 2.8 to 11.6 GHz, with two notched bands, around of 3.3-3.7 GHz and 5-6 GHz covering all WiMAX and WLAN bands.

Keywords
Dual band-notched antenna, protruded strip, WiMAX, WLAN, UWB system.

Cite this paper
Naser Ojaroudi, A New Design of Monopole Antenna with 3.5/5.5 GHz Dual Band-Stop Function Using Protruded Strip Resonators , SCIREA Journal of Computer. Volume 1, Issue 2, December 2016 | PP. 118-126.

References

[ 1 ]	D. Cheng, Compact ultra wideband microstrip resonating antenna, US patent7872606, Jan. 2011.
[ 2 ]	Z. N. Chen, “Impedance characteristics of planar bow-tie-like monopole antennas,” Electronics Letters, vol. 13, pp. 1100 – 1101, 2000.
[ 3 ]	S. H. Choi, J. K. Park, S. K. Kim and J. Y. Park, “A new ultra-wideband antenna for UWB applications,” Microwave and optical technology letters, vol. 40, pp. 399-401, 2004.
[ 4 ]	A. Dastranj and H. Abiri, “Bandwidth enhancement of printed E-shaped slot antennas fed by CPW and microstrip line’, IEEE Trans. Antenna Propag, vol. 58, pp. 1402-1407, 2010.
[ 5 ]	FCC News release, FCC NEWS (FCC 02-48), Feb. 14, 2002.
[ 6 ]	Dissanayake, T. and K. P. Esselle, “Prediction of the notch frequency of slot loaded printed UWB antennas,” IEEE Trans. Antennas and Propag., vol. 55, pp. 3320-3325, 2007.
[ 7 ]	T.-G. Ma, S.-J. Wu ‘Ultrawideband band-notched folded strip monopole antenna’, IEEE Trans. Antennas Propag., vol. 55, pp. 2473–2479, 2007.
[ 8 ]	N. Farrokh-Heshmat, J. Nourinia and C.Ghobadi, “Band-notched Ultra wideband printed open-slot antenna using variable on-ground slits,” Electron. Lett, vol. 45, No. 21, pp 1060-1061, 2009.
[ 9 ]	H. Mardani, C. Ghobadi and J. Nourinia, “A simple compact monopole antenna with variable single-and double-filtering function for uwb applications,” Antennas and Wireless Propagation Letters, IEEE, vol. 9, pp. 1076-1079, 2010.
[ 10 ]	W. M. Li, T. Ni, S. M. Zhang, J. Huang and Y. C. Jiao, “UWB printed slot antenna with dual band-notched characteristic,” Progress In Electromagnetics Research Letters, vol. 25, pp. 143-151, 2011.
[ 11 ]	W. S. Chen and K. Y. Ku, “Band-rejected design of the printed open slot antenna for WLAN/WiMAX operation,” Antennas and Propagation, IEEE Transactions on, vol. 56, pp. 1163-1169, 2008.
[ 12 ]	J. Wang, Y. Yin, X. Liu, and T. Wang , “Trapezoid UWB antenna with dual band-notched characteristics for WiMAX/WLAN bands,” IET Microw. Antennas Propag., vol. 49, pp. 685–686, 2013
[ 13 ]	Y.F. Weng, S.W. Cheung and T.I. Yuk, “Design of multiple band-notch using meander lines for compact ultra-wide band antennas,” IET Microw. Antennas Propag., vol. 6, pp. 908 – 914, 2012.
[ 14 ]	M. M. S. Taheri,H. R.Hassani, and S. M. A. Nezhad, “Compact printed coplanar waveguide-fed ultra-wideband antenna with multiple notched bands,” Microw. Opt. Technol. Lett., vol. 54, no. 9, pp. 2121–2126, 2012.
[ 15 ]	Ansoft Corporation, Ansoft High Frequency Structure Simulator (HFSS), ver. 13, Ansoft Corporation, Pittsburgh, PA, 2010.
[ 16 ]	Y.H. Zhao, J.P. Xu and K. Yin, “Dual band notched ultra wideband microstrip antenna using asymmetrical spurlines,” Electron. Lett., vol. 44, pp. 1051-1052, 2008.
[ 17 ]	Y. Zhang, W. Hong, C. Yu, Z.Q. Kuai, Y.D. Don, and J. Y. Zhou, “Planar ultra wideband antennas with multiple notched bands based on etched slots on the patch and/or split ring resonators on the feed line,” IEEE Transactions on Antennas and Propagation, vol. 56, pp. 3063-3068, 2008.
[ 18 ]	D. S. Javan and O. H. Ghouchani, “Cross slot antenna with U-shaped tuning stub for ultra wideband applications,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 24, pp. 427-432, 2009.
[ 19 ]	R. Azim, M. T.Islam, and N. Misran, “Design of a planar UWB antenna with new band enhancement technique,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 26, no. 10, pp. 856-862, 2011.
[ 20 ]	K. Chung, T. Yun, and J. Choi, “Wideband CPW fed monopole antenna with parasitic elements and slots,” Electronics letters, vol. 40, no. 17, pp. 1038-1040, 2004.