Three-dimensional seven-frequency-band phone antenna

The invention provides a three-dimensional seven-frequency-band phone antenna, and aims at providing a small smart phone antenna which is compatible with 2G/ 3G/ 4G communication frequency bands. The three-dimensional seven-frequency-band phone antenna comprises a first substrate, a second substrate, a first metal sheet set, a second metal sheet set and a third metal sheet set; the first metal sheet set is used for directly feeding and exciting to form a high-order resonance mode for covering a high frequency band; the second metal sheet set and the second metal sheet set form a parasitic short circuit belt for expanding the bandwidth to cover a low-frequency band. According to the three-dimensional seven-frequency-band phone antenna, the space is fully utilized; the area of the antenna in a main circuit board of the phone is reduced and is only 30*11mm; in addition, the bandwidth is large, and the 2G/ 3G/ 4G frequency bands can be covered; meanwhile, no integral element and special substrate materials are adopted, so that the antenna is light in mass, high in efficiency, and suitable for the current smart phone.