J. Sampe, N. H. M. Yunus, J. Yunas, A. Pawi, and Z. A. Rhazali, “Design and fabrication of a dual band 1.8/2.5 GHZ antenna for RF energy harvester”, IJET, vol. 7, no. 4, pp. 3574–3578, Sep. 2018, doi: 10.14419/ijet.v7i4.21736.