This application provides an antenna design solution. An antenna structure including a slot antenna and a wire antenna is disposed, and the antenna structure is excited to generate four antenna modes: a common mode slot antenna, a differential mode slot antenna, a common mode wire antenna, and a differential mode wire antenna in a symmetric feed manner and an anti-symmetric feed manner. This implements a high-isolation and low-ECC feature of a MIMO antenna. In addition, the antenna structure can implement an antenna covering a large quantity of frequency bands, so that an electronic device having limited space can transmit or receive electromagnetic wave signals of the large quantity of frequency bands.