Stealth treatment of turntable in ultra-wideband Radio Frequency Simulation System

Stealth treatment of turntable in Radio Frequency Simulation System (RFSS) with large relative bandwidth is studied in this paper. First, the shape design of three-axis turntable is optimized. Then, the surface-induced current distribution of turntable under horizontal polarization is computed and strong scattering regions are analyzed. Finally, stealth treatments as choosing absorbing materials and suitable coating methods are tested. Based on experiments some effective measures are proposed for stealthy turntable in RFSS. Simulation results show that the three-axis turntable with coated absorbing materials has reduced echo amplitude and more homogeneous distribution.