Multipart Compact Antenna for RF Energy Harvesting

Abstract

Design of a multi-port compact antenna for RF energy harvesting systems is presented in this paper. It consists of an E-shaped coaxial-fed microstrip antennas operating at 958MHz and 2.35GHz each placed on all sides of a cube. The advantage of this approach is that power can be received from all directions and at different polarizations, thereby enhancing the total harvested power. The overall size of the antenna is only 60mm x 60mm x 50mm. The isolation between various ports is below −30 dB ensuring minimum interference between them.