Abstract
A novel multi-band planar 2 x 2 array loop antenna, with a frequency ranging from 0.5-4.5 GHz for energy harvesting applications is presented. The proposed loop antenna consists of an external strip loop and an internal banana strip connected to the external strip loop. The loop antenna occupies a small size of 62 x 38 mm(2), while the total area of the suggested array antenna is 164 x 80 mm(2). A prototype of the proposed 2 x 2 array antenna is fabricated, measured, and the results including return loss, efficiency, and gain, are obtained, and characterized. Therefore, excellent agreement was found between the measured and simulated results.