Method and apparatus for high efficiency rectification for various loads

An apparatus, comprising:

• an antenna;
• and
• an energy harvester including at least one alternating current to direct current (AC-to-DC) converter operatively coupled to the antenna,
• the at least one AC-to-DC converter configured to receive a pulsed input power from a transmitter that sends the pulsed input power to the energy harvester via the antenna, the at least one AC-to-DC converter configured to convert the pulsed input power at a first conversion efficiency and output a direct current based on the pulsed input power,
• the at least one AC-to-DC converter configured to receive a continuous wave input power from a transmitter that sends the continuous wave input power to the energy harvester via the antenna, the at least one AC-to-DC converter configured to convert the continuous wave input power at a second conversion efficiency and output a direct current based on the continuous wave input power,
• the first conversion efficiency for an average power of the pulsed input power being greater than the second conversion efficiency for an average power of the continuous wave input power substantially similar to the average power of the pulsed input power,
• wherein the energy harvester includes at least one impedance matching network electrically coupled to the at least one AC-to-DC converter such that the at least one AC-to-DC converter receives the input power from the at least one impedance matching network,
• wherein the at least one impedance matching network includes a first impedance matching network and a second impedance matching network, the first impedance matching network and a first AC-to-DC converter of the at least one AC-to-DC converter defining a first power path configured to receive a first portion of a power when the power has a first characteristic, the second impedance matching network and a second AC-to-DC converter of the at least one AC-to-DC converter defining a second power path configured to receive a second portion of the power when the power has a second characteristic different from the first characteristic.