The feasibility of harvesting ambient EM energy from
broadcasting frequency band (520-590 MHz) is investigated in
this paper. The proposed efficient rectifier exhibits favorable
impedance matching over a broad input power range (-40 to -
10 dBm) with a fractional bandwidth of 12.6%. The achieved
sensitivity and dynamic range demonstrate the usefulness of
this innovative low input power rectification technique. The
results demonstrate a conversion efficiency of 53% for a
single-tone input power of -10 dBm. Furthermore from a
design and economic perspective, utilizing a large number of
components (e.g. antennas, diodes) to realize individual
rectifier circuits for different frequencies creates additional
expense. Therefore, this efficient method offers a simple and
cost-effective alternative solution, which is of paramount
importance for environmental power harvesting systems.