Indexing
All Issues
Submission
Author Guidelines
Reviewers
Editorial Members
Publication Fee
Vol.1 , No. 2, Publication Date: Sep. 22, 2014, Page: 14-19
 applications is presented. The antenna consists of an ordinary square radiating patch and a modified ground plane with π-shaped slot and conductor-backed plane. By cutting a π-shaped defected ground structure (DGS) and also by embedding a π-shaped conductor-backed plane in air gap distance, additional third and fourth resonances in 12 and 14.5 GHz are excited and much wider impedance bandwidth can be produced. By using these modified structures, the usable upper frequency of the antenna is extended from 10.4 GHz to 15.1 GHz. Simulated and measured results show that the antenna design exhibits an operating bandwidth (S11 ˂ -10 dB) from 2.89 to 15.1 GHz, which provides a wide usable fractional bandwidth of more than 135%. The proposed antenna has an ordinary square radiating patch, therefore displays good omnidirectional radiation patterns even at higher frequencies. The antenna configuration is simple, easy to fabricate and can be integrated into UWB systems.&picture=http://www.aascit.org/aascit/decorators/img/journal/914.jpg)
| [1] | Nasser Ojaroudi, Department of Electrical Engineering, Germi Branch, Islamic Azad University, Germi, Iran. |
A novel design of small monopole antenna with enhanced bandwidth property for ultra-wideband (UWB) applications is presented. The antenna consists of an ordinary square radiating patch and a modified ground plane with π-shaped slot and conductor-backed plane. By cutting a π-shaped defected ground structure (DGS) and also by embedding a π-shaped conductor-backed plane in air gap distance, additional third and fourth resonances in 12 and 14.5 GHz are excited and much wider impedance bandwidth can be produced. By using these modified structures, the usable upper frequency of the antenna is extended from 10.4 GHz to 15.1 GHz. Simulated and measured results show that the antenna design exhibits an operating bandwidth (S11 ˂ -10 dB) from 2.89 to 15.1 GHz, which provides a wide usable fractional bandwidth of more than 135%. The proposed antenna has an ordinary square radiating patch, therefore displays good omnidirectional radiation patterns even at higher frequencies. The antenna configuration is simple, easy to fabricate and can be integrated into UWB systems.
Keywords
Bandwidth Improvement, π-Shaped Structure, UWB Applications
Reference
| [01] | FCC News release, FCC NEWS (FCC 02-48), Feb. 14, 2002. |
| [02] | D. Cheng, Compact ultra wideband microstrip resonating antenna, US patent7872606, Jan. 2011. |
| [03] | 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. |
| [04] | J. Y. Sze and K. L. Wong, “Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna,” IEEE Trans. Antennas Propag., vol. 49, pp. 1020–1024, 2001. |
| [05] | 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. |
| [06] | A.J. Kerkhoff, R.L. Rogers, and H. Ling, Design and analysis of planar monopole antennas using a genetic algorithm approach, IEEE Trans Antennas Propag vol. 2, pp. 1768–1771, 2004. |
| [07] | Z. N. Chen, “Impedance characteristics of planar bow-tie-like monopole antennas”, Electronics Letters, vol. 36, pp. 1100 – 1101. |
| [08] | N. Ojaroudi, “Design of ultra-wideband monopole antenna with enhanced bandwidth,” 21th Telecommunications Forum, TELFOR 2013, 27 – 28 November, 2013, Belgrade, Serbia, pp. 1043-1046, 2013. |
| [09] | N. Ojaroudi, “A new design of Koch fractal slot antenna for ultra-wideband applications,” 21th Telecommunications Forum, TELFOR 2013, 27 – 28 November, 2013, Belgrade, Serbia, pp. 1051-1054, 2013. |
| [10] | Ansoft High Frequency Structure Simulation (HFSS), ver. 13, Ansoft Corporation, 2010. |
| [11] | N. Ojaroudi, H. Ojaroudi, and N. Ghadimi, “Quad-band planar inverted-f antenna (pifa) for wireless communication systems,” Progress In Electromagnetics Research Letters, Vol. 45, 51-56, 2014. |
| [12] | N. Ojaroudi, and N. Ghadimi, “Design of CPW-fed slot antenna for MIMO system applications,” Microw. Opt. Technol. Lett., vol. 56, pp. 1278–1281, 2014. |
| [13] | N. Ojaroudi, and N. Ghadimi, “Dual-band CPW-fed slot antenna for LTE and WiBro applications,” Microw. Opt. Technol. Lett., vol. 56, pp. 1013–1015, 2014. |
| [14] | N. Ojaroudi, “Microstrip monopole antenna with dual band-stop function for UWB Applications,” Microw. Opt. Technol. Lett., vol. 56, pp. 818–822, 2014. |
| [15] | N. Ojaroudi, “Circular microstrip antenna with dual band-stop Performance for ultra-wideband systems,” Microw. Opt. Technol. Lett., vol. 56, pp. 2095–2098, 2014. |
| [16] | N. Ojaroudi, “Design of UWB monopole antenna with dual band-stop characteristic,” Loughborough Antennas and Propagation Conference (LAPC '14), 10-11 November, 2014, Loughborough, UK. |
| [17] | N. Ojaroudi, “Reconfigurable microstrip-fed monopole antenna for multimode application,” Loughborough Antennas and Propagation Conference (LAPC '14), 10-11 November, 2014, Loughborough, UK. |
| [18] | N. Ojaroudi, “An UWB microstrip antenna with dual band-stop performance using a meander-line resonator,” in Proceedings of the 22th International Conference on Software, Telecommunications and Computer Networks (SoftCOM), 17-19 September, 2014, Split, Croatia. |
| [19] | N. Ojaroudi, H. Ojaroudi, Y. Ojaroudi, “Very low profile ultra-wideband microstrip band-stop filter. Microw. Opt. Technol. Lett., vol. 56, pp. 709-711, 2014. |
| [20] | N. Ojaroudi, S. Amiri, and F. Geran, “A novel design of reconfigurable monopole antenna for UWB applications,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 28, no. 6, pp. 633-639, July 2013. |
| [21] | N. Ojaroudi, “Application of protruded strip resonators to design an UWB slot antenna with WLAN band-notched characteristic,” Progress in Electromagnetics Research C, vol. 47, pp. 111-117, 2014. |
| [22] | N. Ojaroudi, “Small microstrip-fed slot antenna with frequency band-stop function,” 21th Telecommunications Forum,” TELFOR 2013, 27 – 28 November, 2013, Belgrade, Serbia., pp. 1047-1050, 2013. |
| [23] | N. Ojaroudi, “Design of microstrip antenna for 2.4/5.8 GHz RFID applications,” German Microwave Conference, GeMic 2014, 10-12 March, RWTH Aachen University, Germany. |
| [24] | N. Ojaroudi, Sh. Amiri, and F. Geran, “Reconfigurable monopole antenna with controllable band-notched performance for UWB communications,” 20th Telecommunications Forum, TELFOR 2012, 20 – 22November, 2012, Belgrade, Serbia, pp. 1176-1178, 2013. |
| [25] | N. Ojaroudi, “Compact UWB monopole antenna with enhanced bandwidth using rotated L-shaped slots and parasitic structures,”Microw. Opt. Technol. Lett., vol. 56, pp.175–178, 2014. |
| [26] | N. Ojaroudi, “New design of multi-band PIFA for wireless communication systems,” 19th International Symposium on Antenna and propagation, ISAP2014, 2-5 December, 2012, Kaohsiung, Taiwan. |
| [27] | N. Ojaroudi, “Design of small reconfigurable microstrip antenna for UWB-CR applications,” 19th International Symposium on Antenna and propagation, ISAP2014, 2-5 December, 2012, Kaohsiung, Taiwan. |
