FDTD analysis of resistor-loaded bow-tie antennas covered with ferrite-coated conducting cavity for subsurface radar

Author

Nishioka, Yasuhiro ; Maeshima, Osamu ; Uno, Toru ; Adachi, Saburo

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo Univ. of Agric. & Technol., Japan

Volume

47

Issue

6

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

970

Lastpage

977

Abstract

This paper presents a full-wave analysis of a ground penetrating radar (GPR) using the finite-difference time-domain (FDTD) method. The antenna treated here consists of a resistor-loaded bow-tie antenna, which is covered with a rectangular conducting cavity of which inner walls are coated partially or fully with ferrite absorber. Some techniques are introduced into the FDTD analysis to obtain the accurate results and to save the computer resources. The validity of the FDTD analysis is confirmed experimentally. Furthermore, the effects of the ferrite absorber on the GPR characteristics are theoretically investigated in detail. The FDTD results indicate that the remarkable improvement of the antenna characteristics for the GPR system cannot be attained by the ferrite absorber

Keywords

UHF antennas; antenna accessories; buried object detection; dipole antennas; electromagnetic wave absorption; ferrites; finite difference time-domain analysis; radar antennas; radar detection; 250 kHz; 600 MHz; FDTD analysis; GPR; ferrite absorber; ferrite-coated conducting cavity; finite-difference time-domain method; full-wave analysis; ground penetrating radar; rectangular conducting cavity; resistor-loaded bow-tie antennas; subsurface radar; Buried object detection; Dipole antennas; Electromagnetic scattering; Ferrites; Finite difference methods; Ground penetrating radar; Radar detection; Reflection; Signal processing; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.777119

Filename

777119