An electronic device includes a base plate and a miniaturized multiband antenna. The multiband antenna is set on the base plate. The base plate includes a first side and a second side relative to the first side. The multiband antenna includes a first radiating part and a second radiating part. The first radiating part is set on the first side. The second radiating part is set on the second side. A gap is formed between the first radiating part and the second radiating part which facilitates a coupling oscillation between the first radiating part and the second radiating part, which enables the multiband antenna to work in at least one working band.