Antenna device, rectifier circuit, power supply device, and electronic device

An electronic device, comprising:

• an antenna unit including a rectifier circuit that receives electric field energy of a radio wave or a quasi-electrostatic field (near field) in a space and rectifies an AC signal into a direct current, the antenna unit including a first antenna element that is a conductor to be used in contact with a human body and a second antenna element that is a conductor different from the first antenna element and provided not to be in contact with the human body in a state where the human body is not grounded to a ground that is earth,
• wherein an input line output to the rectifier circuit from the first antenna element used in contact with the human body of the AC signal output from the antenna unit is connected in series to the rectifier circuit;
• an energy storage device charged by an output of the rectifier circuit;
• and
• a communication unit that uses an output of the energy storage device as a power supply.