Abstract
A novel high-resolution electromagnetic-wave-source visualization system is presented. The system can determine the incidence angle and visualize the wave source by combining a Lüneburg lens with an electromagnetic band gap (EBG) absorber. The Lüneburg lens is used to physically separate the incident waves coming from different directions and to focus them onto the different focal points on the lens surface. Every element of the EBG absorber coincides with a different focal point on the lens surface, so that the intensity and angle information of the incident wave can be obtained based on the absorbed power and position of the corresponding sensor element. The estimated angular resolution is 2.56 degrees and the system sensitivity is −65.6 dBm/m2 at 2.45 GHz. The results were confirmed by prototype evaluation.
