Fig. 4From: RF power harvesting: a review on designing methodologies and applicationsTypes of antennas a 2.45 GHz patch antenna with rectifier [38]. ©2010 IEEE. All rights reserved; b Planar dual-polarized antenna [24]. ©2015 IEEE. All rights reserved; c Microstrip antenna [37]. ©2012 IEEE. All rights reserved; d Array of stacked differential patch antenna [33]. ©2015 IEEE. All rights reservedBack to article page