Design of a Compact Planar Rectenna for Wireless Power Transfer in the ISM Band

Table 2

Peak gain and efficiency measurement results of the antenna without and with lump elements.

Antenna	Without lump elements		With lump elements
Frequency (MHz)	Peak gain (dBi)	Efficiency (%)	Peak gain (dBi)	Efficiency (%)
2,700	3.941	85.87	3.942	86.662
2,725	3.472	78.52	3.388	79.276
2,750	3.502	79.707	3.363	80.279
2,775	2.655	77.45	2.862	77.892
2,800	3.335	91.783	3.372	91.779
2,825	3.092	89.016	3.257	89.107
2,850	3.547	96.022	3.491	95.298
2,875	3.18	87.518	3.015	86.662
2,900	3.504	91.554	3.115	91.051