Antenna device and electronic device

The invention discloses an antenna device and an electronic device, which are used for solving the problem of limitation on the expansion effect of an antenna working frequency band by an adjustable capacitor in the prior art. The antenna device comprises an antenna, a frequency regulator and a control module, wherein the frequency regulator comprises a resonant module, a first end of the resonant module is connected with a signal transmission port of the antenna, the resonant module comprises an inductor and an adjustable capacitor, the inductor and the adjustable capacitor are connected in a first connection mode so as to expand the regulation range of the antenna working frequency band by the adjustable capacitor, and the control module is connected with the resonant module and used for regulating a capacitance value of the adjustable capacitor based on the target working frequency of the antenna so that the working frequency band of the antenna covers the target working frequency.