Figure 9
From: Efficient and Sensitive Electrically Small Rectenna for Ultra-Low Power RF Energy Harvesting
Antenna’s impedance in terms of Re and Im part versus frequency (a), gain in the horizontal plane (i.e., xy-plane) for a single antenna and an antenna-array of two elements placed side-by-side at distance λ/2 (b), rectenna’s reflection coefficient versus frequency for various levels of input power (c) and versus power input at 868 MHz (d). At (c,d) the rectenna’s load was 2193 \({\rm{\Omega }}\). All the results are based on simulations.
