Analysis of GPR Antenna System Mounted on a Vehicle

This letter describes a ground penetrating radar (GPR) antenna system mounted on a moving vehicle for the exploration of the subsurface. The antenna system includes two identical half-ellipse antennas: One is used for transmission, and the other is for reception. Each antenna has a pair of half-elliptical-shaped arms, which are loaded by continuous resistive elements. A shallow rectangular conducting backed cavity is attached above the antenna system. The antenna efficiency, VSWR, radiation patterns, and isolation are analyzed. The time-domain waveforms of the antenna system are also given. The results of simulations and measurements are compared together, and good agreements between them are achieved. The results show that the antenna system is suitable for a variety of broadband radar applications under different conditions.

[1]  Seung Ryeol Lee,et al.  Kaguya Lunar Radar Sounder observation of Sinus Iridum , 2012, 2012 14th International Conference on Ground Penetrating Radar (GPR).

[2]  Alexander Yarovoy,et al.  Cavity-Backed UWB Antenna for Impulse Radio Applications , 2007 .

[3]  L.L. Liu,et al.  Study about the radiation characteristics of bow-tie antennas with discrete resistor-loaded , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[4]  A.G. Yarovoy,et al.  RC-loaded bow-tie antenna for improved pulse radiation , 2004, IEEE Transactions on Antennas and Propagation.

[5]  A. Loizos,et al.  Accuracy of Ground Penetrating Radar Horn-Antenna Technique for Sensing Pavement Subsurface , 2007, IEEE Sensors Journal.

[6]  A.G. Yarovoy,et al.  Adaptive Bow-Tie Antenna with Increased Bandwidth , 2002, 2002 32nd European Microwave Conference.

[7]  Liang C. Shen,et al.  The cylindrical antenna with nonreflecting resistive loading , 1965 .

[8]  Toru Uno,et al.  FDTD analysis of resistor-loaded bow-tie antennas covered with ferrite-coated conducting cavity for subsurface radar , 1999 .

[9]  纪奕才,et al.  Analysis of GPR UWB Half-Ellipse Antennas with Different Heights of Backed Cavity above Ground , 2010 .

[10]  James G. Maloney,et al.  Optimization of bow-tie antennas for pulse radiation , 1994 .

[11]  J. Yamauchi,et al.  Unbalanced-Mode Spiral Antenna Backed by an Extremely Shallow Cavity , 2009, IEEE Transactions on Antennas and Propagation.

[12]  James G. Maloney,et al.  Accurate analysis of TEM horn antennas for pulse radiation , 1996 .