Table 2 Electrically Small Rectenna Comparisons: rectennas have the same radiation pattern with the relevant antennas (Table 1).

From: Efficient and Sensitive Electrically Small Rectenna for Ultra-Low Power RF Energy Harvesting

 

ka

Pin (dBm)

η (%)

matching network

7

0.611

0

79.6+

no

8

0.996

−9

37+

yes

9

0.604

0

67.9+

no

this work

0.53

−19

22.5+

no

  1. +Measured.