In this paper, ultra-wideband and miniaturization, technique for the microstrip monopole patch antenna (MMPA) in wireless applications is presented. Ultra-wideband was achieved by using Printed modified ground plane on a dielectric substrate with 50 microstrip feed line. This technique allows the bandwidth of the MMPA to be ultra-wideband with satisfactory radiation properties and reduce the antenna size. The proposed antenna with modified ground plane provides an mpedance bandwidth (S11 < -10 dB) more than 5.5 GHz corresponding to 116% of fundamental resonant frequency with reduction in antenna size by 20% from original size. For further improvement in antenna characteristics, electromagnetic band-gap (EBG) structure is used. The surface wave was suppressed so the antenna bandwidth was increased to be 3--11 GHz corresponding to 170%, and the antenna size was reduced 43% of its original size. Two types of EBG are used. Holes are drilled around the patch, and embedded circular patches of the electromagnetic band-gap structure with suitable dimension are used. Details of the proposed antenna design have been described, and the typical experimental results are presented and discussed. Commercial software high frequency structure simulator (HFSS®) version 11 was used for the antenna design.
2. John, M. and M. J. Ammann, "Spline-based geometry for printed monopole antennas," Electronics Letters, Vol. 43, 7-8, 2007.
doi:10.1049/el:20073802
3. Liang, J., C. C. Chiau, X. Chen, and C. G. Parini, "Study of a printed circular disc monopole antenna for UWB systems," IEEE Trans. on Antennas and Propag., Vol. 53, 3500-3504, 2005.
doi:10.1109/TAP.2005.858598
4. Wu, Q., R. Jin, J. Geng, and J. Lao, "Ultra-wideband rectangular disk monopole antenna with notched ground," Electronics Letters, Vol. 43, 605-606, 2007.
doi:10.1049/el:20070910
5. Liu, Z. D., P. S. Hall, and D.Wake, "Dual-frequency planar invert-F antenna," IEEE Trans. on Antennas and Propag., Vol. 45, 1451-1457, 1997.
doi:10.1109/8.633849
6. Kan, H. R. and R. B. Waterhouse, "Size reduction techniques for shorted patches," Electronics Letters, Vol. 35, 948-949, 1999.
doi:10.1049/el:19990703
7. Nashaat, D., H. Elsadek, and H. Ghali, "Broad band U-shaped PlFA with dual band capability for bluetooth and WLAN applications," Proceedings of IEEE International Symposium on Antenna and Propagation, Vol. 4, No. 1, January 2005.
8. Elsadek, H. and D. M. Nashaat, "Multiband and UWB V-shaped antenna configuration for wireless communications applications," IEEE Antenna and Wireless Propagation Letters, Vol. 7, 2008.
9. Brown, E. R., C. D. Parker, and E. Yablonovitch, "Radiation properties of a planar antenna on a photonic-crystal substrate," Opt. Soc. Amer. B, Vol. 10, No. 2, 404-407, February 1993.
doi:10.1364/JOSAB.10.000404
10. Matthew, M. B., et al., "Two dimensional photonic crystals fabry-perror resonators with loss dielectrics," IEEE Trans. Microwave Theory Tech., Vol. 49, No. 11, 2085-2090, November 1999.
11. Gonzalo, R., P. Maaget, and M. Sorolla, "Enhanced patch antenna performance by suppressing surface waves using photonic band-gap substrates," IEEE Transaction on Microwave Theory and Techniques, Vol. 47, No. 11, 2131-2138, November 1999.
doi:10.1109/22.798009
12. Mosallei, H. and K. Sarabandi, "Antenna miniaturization and bandwidth enhancement using a reactive impedance substrate," IEEE Trans. on Antennas and Propag., Vol. 52, No. 9, September 2004.
13. Hao, Y. and C. G. Paini, "Isolation enhancement of anisotropic UC-PBG microstrip diplexer patch antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 1, 135-137, 2002.
doi:10.1109/LAWP.2002.806757
14. Nashaat, D., H. A. Elsadek, E. Abdallah, H. Elhenawy, and M. F. Iskander, "Enhancement of ultra-wide bandwidth of microstrip monopole antenna by using metamaterial structures," IEEE Antenna and Wireless Propagation Letters, submitted, 2009.
Submit
