3d Printed Horn Antenna for Near Field Isar Imaging Applications

Abstract

In this study, low-cost horn antenna for Ka frequency band is fabricated help of 3-dimensional (3D) printer. Produced antennas are used in near-field ISAR imaging. The performance of the antennas is evaluated with Vector Network Analyzer (VNA). In the constructed ISAR imaging system with these antennas, the backscattering signals reflected from the target are collected. Targets are scanned 360and backscattering signals are recorded for 26.5 to 40 GHz frequencies with 974 sampling points. In the first experiment, a metal box is placed in the experimental setup. Then, back-projection algorithm is applied to the raw data to obtain the ISAR image of the target. In the second experiment, the metal box is covered with a textile. The backscattering signals reflected from the covered target are gathered. The image of the second target is created by applying the back-projection algorithm to the ISAR raw data. The experimentalresults show that the antennas are suitable for ISAR imaging applications.