The present invention provides a low-profile double-frequency ultra-
wideband antenna, which comprises at least one double-frequency ultra-
wideband vibrator unit. The double-frequency ultra-
wideband vibrator unit comprises a pair of ultra-wideband vibrators printed on a
dielectric substrate and arranged in an orthogonal manner. The two arms of each ultra-wideband vibrator are of a fat-block shape, and the two arms of each ultra-wideband vibrator are provided with arc grooves at the ends along the edges at two sides. The end of each ultra-wideband vibrator is loaded with a section of arc
branch knot along the outer edges of the vibrator arms. The centrally intersecting part is provided with a feeding point connected
coaxial cable or a balancing device. According to the invention, through the adoption of a thick highly-
dielectric-constant
dielectric substrate and the use of the manner of opening grooves on the vibrator surface and the loading of open circuit
branch knot at the end, it is possible to provide for a micro
base station of mobile communications a low-profile double-frequency ultra-
wideband antenna featuring a low profile, a small size, the realization of
MIMO, high separation and a high
gain. The method is also innovative in idea, clear in principle, suitable for use and easy for implementation. With a low cost, the antenna can be produced in batches, and it can best replace a traditional
Small Cell antenna. In addition, for the design and improvement in a traditional wideband intersecting vibrator antenna, the invention can also apply effectively.