Four-trap ultra-wideband antenna

The invention relates to a four-trap ultra-wideband antenna, and belongs to the field of wireless communication technology. The four-trap ultra-wideband antenna comprises a dielectric slab (1), a radiating unit (2), two C-shaped grooves (3) and (4) etched on the radiating unit (2) with different dimensions, two additional L-shaped open-circuit branches (5) and (6) on the radiating unit (2) with the same structure, a feed unit (7), a T-shaped spurious belt wire (8) printed at the back of the dielectric slab (1), and an earth plate (9). The four-trap ultra-wideband antenna has a simple structure, compact size, light weight and low loss, and meets the requirement on plane designs, and also has low manufacturing cost, high precision, high repeatability, high performance on an ultra-wideband and high trap properties, and can effectively filter a WiWAX signal, a WLAN signal, a downlink X-band satellite communication signal, and an ITU (International Telecommunication Union) signal acting in the frequency ranging from 8.025GHz to 8.4GHz, which bring influence to the ultra-wideband, and also can remove electromagnetic interference signals in a plurality of frequency ranges.