Vivaldi Antenna for Ground Penetrating Radar Applications

2018 ◽  
Vol 50 (001) ◽  
pp. 07-12 ◽  
Author(s):  
S. S. MEMON ◽  
A. A. JAMALI ◽  
M. R. ANJUM ◽  
M. M. MEMON ◽  
S. F. QADRI
Keyword(s):  
Ground Penetrating Radar ◽  
Radar Applications ◽  
Vivaldi Antenna ◽  
Ground Penetrating

Effect of antennas on velocity estimates obtained from crosshole GPR data

Geophysics ◽  
2005 ◽  
Vol 70 (5) ◽  
pp. K39-K42 ◽  
Author(s):  
James D. Irving ◽  
Rosemary J. Knight
Keyword(s):  
Numerical Modeling ◽  
Ground Penetrating Radar ◽  
Significant Fraction ◽  
High Angle ◽  
Standard Assumption ◽  
Tomographic Images ◽  
Wide Range ◽  
Antenna Length ◽  
Ground Penetrating

To obtain tomographic images with the highest possible resolution from crosshole ground-penetrating radar (GPR) data, raypaths covering a wide range of angles between the boreholes are required. In practice, however, the inclusion of high-angle ray data in crosshole GPR inversions often leads to tomograms so dominated by inversion artifacts that they contain little reliable subsurface information. Here, we investigate the problems that arise from the standard assumption that all first-arriving energy travels directly between the centers of the antennas. Through numerical modeling, we show that this assumption is often incorrect at high transmitter-receiver angles and can lead to significant errors in tomographic velocity estimates when the antenna length is a significant fraction of the borehole spacing.

Design of Shielding System for Impulse Ground Penetrating Radar Applications

2015 ◽  
Vol 656-657 ◽  
pp. 646-651 ◽  
Author(s):  
Tan Phuoc Dong ◽  
Huu Phu Bui
Keyword(s):  
Ground Penetrating Radar ◽  
High Performance ◽  
Signal Transmission ◽  
Design Procedure ◽  
External Noise ◽  
Deep Penetration ◽  
Antenna Coupling ◽  
Radar Applications ◽  
Ground Penetrating ◽  
Shielding System

In this paper, we propose a shielding system for impulse ground penetrating radar applications (GPR). The structure of shielding system is designed for our real impulse GPR application at 200 MHz central frequency for improving the deep penetration. The shielding system makes high quality of signal transmission from transmitter antenna to receiver antenna for impulse GPR system. It not only makes lowest T/R antenna coupling, high performance of antennas, preventing external noise but also reduces unnecessary air radiation which damages to the health of GPR user. A commercial absorbing material with a short thickness of 40mm is used to reduce the reflection of upper side of antenna in the cavity of shielding system. The design procedure is derived and its performance is explained. Shielding system is designed, simulated and optimized successfully in CST 2013 software. And it is fabricated with a good measurement results.

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