The Advancement of Radio Frequency Energy Harvesters (RFEHs) as a Revolutionary Approach for Solving Energy Crisis in Wireless Communication Devices: A Review. - Loganathan Ramalingam; Selvakumar Mariappan; Pharveen Parameswaran; Jagadheswaran Rajendran; Ram Sharma Nitesh; Narendra Kumar 001; Arokia Nathan; Binboga Siddik Yarman (IEEE Access, 2021)