An Efficient Ultra-Wideband Bow-Tie Antenna

Author

Lestari, A.A. ; Yarovoy, A.G. ; Ligthart, L.P.

Author_Institution

International Research Centre for Telecommunications-transmission and Radar (IRCTR), Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands. Phone: 31-15-2782496, Fax: 31-15-2784046, Email: a.lestari@its.tudelft.nl

fYear

2001

fDate

24-26 Sept. 2001

Firstpage

1

Lastpage

4

Abstract

In this paper, a transient bow-tie antenna for Ground Penetrating Radar applications is discussed. This antenna exhibits good efficiency and an ultra-wideband property due to a combination of a tapered capacitive and a resistive loading. The tapered capacitive loading is realized by constructing an array of slots on the antenna surface and the resistive loading is obtained by making use of microwave absorber blocks placed on the slotted surface of the antenna. Using a 0.8-ns monocycle as input pulse, the amplitude of its transmit waveform is 70% higher than that of a conventional bow-tie antenna of equal dimension. The transmit waveform is a nearly symmetrical triplet with a late-time ringing level of lower than Â¿33 dB.

Keywords

Bandwidth; Finite difference methods; Ground penetrating radar; Loaded antennas; Radar antennas; Slot antennas; Time domain analysis; Transmitting antennas; Ultra wideband antennas; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. 31st European

Conference_Location

London, England

Type

conf

DOI

10.1109/EUMA.2001.338982

Filename

4140050