Improvements in a High Gain UWB Antenna with Corrugated Edges

In this paper, a novel corrugated structure at the edges of the Vivaldi substrate is presented. Compared with the Vivaldi antenna without corrugated structure, the new structure has a better radiation pattern. While compared with the traditional corrugated structure, the new structure has a better front-to-back ratio (F/B ratio). Properly chosen thickness and dielectric constant of substrate ensure a relatively small size while the lower frequency is around 1GHz. A Vivaldi structure also promises high gain in ultra-wideband (UWB) range. For its planar structure, the antenna is easily fabricated with a low cost. The design of a novel Vivaldi antenna described in this paper operates from 1GHz to more than 3GHz with i10dB return loss and produce the gain with a range of 7dBi » 11dBi. The current design is one of the most ideal antennas to be used for through-wall radar.

[1]  E. Gazit,et al.  Improved design of the Vivaldi antenna , 1988 .

[2]  A. Safaai-Jazi,et al.  UWB applications for through-wall detection , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[3]  G. M. Rebeiz,et al.  Millimeter-wave Fermi tapered slot antennas on micromachined silicon substrates , 2002 .

[4]  Kai Chang,et al.  Ultra wideband exponentially-tapered antipodal Vivaldi antennas , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[5]  Kurt Konolige,et al.  Robot-mounted through-wall radar for detecting, locating, and identifying building occupants , 2000, Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065).

[6]  Z. N. Chen,et al.  Antipodal Vivaldi Antenna for UWB Applications , 2007 .

[7]  A. Fathy,et al.  DESIGN OF COMPACT VIVALDI ANTENNA ARRAYS FOR UWB SEE THROUGH WALL APPLICATIONS , 2008 .

[8]  Hao Ling,et al.  Through-wall measurements of a Doppler and direction-of-arrival (DDOA) radar for tracking indoor movers , 2005, 2005 IEEE Antennas and Propagation Society International Symposium.

[9]  P. J. Gibson.  The Vivaldi Aerial , 1979, 1979 9th European Microwave Conference.

[10]  K. Mizuno,et al.  Characteristics of a MM-wave tapered slot antenna with corrugated edges , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).