Electronic device having antenna

An electronic device having an antenna, comprising:

• a first metal casing having a first side edge;
• a second metal casing having a second side edge;
• a first hinge conductively connected to the first side edge of the first meta casing and the second side edge of the second metal casing respectively;
• a second hinge conductively connected to the first side edge of the first metal casing and the second side edge of the second metal casing respectively, wherein a first slot antenna structure is composed of the first metal casing, the second metal casing, the first hinge and the second hinge, the first slot antenna structure has a first half-wavelength resonant mode, the first slot antenna structure has a first middle portion and two first end portions, and a width of the first middle portion is less than a width of each of the two first end portions;
• a first dipole antenna disposed in the first middle portion of the first slot antenna structure, wherein the first dipole antenna has a second half-wavelength resonant mode, the first dipole antenna has a first radiation portion and a second radiation portion, the first radiation portion has a first feeding terminal, the second radiation portion has a first ground terminal, and the first dipole antenna used for exciting the first half-wavelength resonant mode of the first slot antenna structure;
• wherein both of the first metal casing and the second metal casing are electrically connected to the first ground terminal;
• a third hinge electrically connected to the first side edge of the first metal casing and second side edge of the second metal casing, wherein a second slot antenna structure is composed of the second hinge, the first metal casing, the third hinge and the second metal casing, the second slot antenna structure has a third half-wavelength resonant mode, the second slot antenna structure has a second middle portion and two second end portions, and a width of the second middle portion is less than a width of each of the two second end portions;
• and
• a second dipole antenna disposed in the second middle portion of the second slot antenna structure, wherein the second dipole antenna has a fourth half wavelength resonant mode, the second dipole antenna has a third radiation portion and a fourth radiation portion, the third radiation portion has a second feeding terminal, the fourth radiation portion has a second around terminal, and the second dipole antenna is used for exciting the third half-wavelength resonant mode of the second slot antenna structure;
• wherein, the first metal casing, the second metal casing, and the third hinge are all electrically connected to the second ground terminal.