Chapter 3: Vehicle-Mounted GPR System for Landmine Detection

3.2 Development of the System 29
for the metal detector data. The system is a vector network analyzer based radar
system, i.e., it is a stepped-frequency radar system. The reason why this type of
radar system is employed is that the most critical parameter to investigate
subsurface object is the operating frequency range, and it can easily be changed in a
stepped-frequency radar system.
The radar system except the PCs and VNA controller is assembled and installed
in the case shown in Fig. 3.2. The lower blue box includes the six antennas, and the
upper white box has three VNAs. The size of the case is 50×40×50 cm, and the
weight is 14 kg. The case is attached to the tip of the robot arm on which the vehicle
is developed by Fuji Heavy Industries Ltd., Japan and by the Department of
Electronics and Mechanical Engineering, Chiba University, Japan as shown in Fig.
3.3.