Lestari, A. A.; Yarovoy, A. G.; Ligthart, L. P. (IRCTR, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)
Wahyu, Y. (Indonesian Institute of Sciences, Kompleks LIPI, Jalan Sangkuriang, Bandung 40135, Indonesia)
Antenna footprint indicates the shape and size of the area illuminated by the antenna on the ground surface or subsurface. For GPR it is important as it determines the crossrange resolution of the radar. In this paper we demonstrate that an array antenna comprising a number of rolled-dipole elements can produce a variable footprint by activating certain elements and deactivating the others. In this way the size of the array’s footprint can be adjusted to remain comparable with the cross section of various targets which in turn minimizes clutter and improving the GPR performance. This paper presents FDTD simulation results and preliminary experimental result of the proposed antenna.