Signal processing method and an electronic device

The invention discloses a signal processing method and electronic equipment. The method comprises steps of receiving a first instruction, wherein the first instruction is an instruction for indicating support of a second frequency range, and the center frequency of the second frequency range is different from that of a first frequency range; and responding to the first instruction, and controlling a resonance unit for adjusting self impedance, so that an antenna unit is enabled to resonate with the center frequency of the second frequency range, wherein the self impedance of the resonance unit presents inductance characteristics. The invention can support the antenna unit for working at multiple frequency ranges, and the radiation performance of the antenna unit at each frequency range is ensured.