The invention discloses a small UWB (ultra-
wideband) antenna with band-notch characteristics in
multiple frequency bands. The antenna comprises an earth plate, a
dielectric substrate, a
feed network and a
radiation patch, wherein the earth plate is arranged on one side of the
dielectric substrate, the
feed network and the
radiation patch are arranged on the other side of the
dielectric substrate, the
radiation patch adopts a rectangular structure with a step-shaped bulge, the step-shaped bulge end of the radiation patch is connected with the
feed network, a U-shaped groove and a T-shaped groove are etched in the radiation patch, and the feed network comprises
microstrip lines. The antenna can effectively inhibit interference of signals from various narrow-band systems of
WiMAX wireless communication in a work
frequency band ranging from 3.3 GHz to 3.7 GHz, C-band
satellite communication in a downlink
frequency band ranging from 3.7 GHz to 4.2 GHz, digital
microwave communication in the work
frequency band ranging from 4.3 GHz to 4.5 GHz, large-capacity
microwave communication in the work frequency band ranging from 4.4 GHz to 5.0 GHz, a part of WLAN (
wireless local area network)
wireless communication in the work frequency band ranging from 5.15 GHz to 5.35 GHz, to the UWB
system. The antenna is small in size, simple in structure, easy to manufacture and wear, good in performance and capable of being applied to various UWB communications.