Characterization of transient bow-tie antennas for ground-penetrating radar

A. A. Lestari; Alexander G. Yarovoy; Leo P. Ligthart

doi:10.1117/12.462193

12 April 2002 Characterization of transient bow-tie antennas for ground-penetrating radar

A. A. Lestari, Alexander G. Yarovoy, Leo P. Ligthart

Proceedings Volume 4758, Ninth International Conference on Ground Penetrating Radar; (2002) https://doi.org/10.1117/12.462193
Event: Ninth International Conference on Ground Penetrating Radar (GPR2002), 2002, Santa Barbara, CA, United States

Abstract

In this paper a comprehensive characterization of transient bow-tie antennas for GPR applications is presented. In particular the characteristic impedance of a transient bow-tie antenna above different types of ground, as a function of its flare angle is given. The time-domain reflection coefficient of the transient bow-tie antenna above the ground is derived and also plotted as a function of flare angle. This result shows that there exists an optimal flare angle which gives minimal reflection at the antenna terminal for various ground types. Additionally, here we also investigate the characteristic impedance as a function of antenna elevation above the ground. Moreover, in this paper the subsurface footprints of bow-tie antennas as a function of flare angle for different ground types are shown. This result shows that depending on the target's size, the size of footprint can be adjusted by varying the flare angle in order to reduce clutter from ground surface. The analysis is carried out in the frequency-domain using the mixed-potential integral equation (MPIE) method for problems in multi-layer media, which is solved numerically by the method of moments. The solution in the time domain for transient antennas is obtained using the Fourier transform method and a time window technique to remove open-end reflections.

Citation Download Citation

A. A. Lestari, Alexander G. Yarovoy, and Leo P. Ligthart "Characterization of transient bow-tie antennas for ground-penetrating radar", Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); https://doi.org/10.1117/12.462193

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available