Title :
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
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 ¿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;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.338982
