An ultra wideband antenna comprises a substrate (21 ). A metal layer deposited on the substrate comprises first and second non-metallic regions (22a, 22b) defined therein. The first and second non-metallic regions (22a, 22b) are arranged on either side of a longitudinal axis (X0), the longitudinal axis (X0) corresponding to a feed axis of the antenna. The first and second non-metallic regions taper towards the first longitudinal (X0) to form a bowtie pattern. Each of the first and second non-metallic regions (22a, 22b) comprises at least one tuning slot (31, 33), the at least one tuning slot (31, 33) being arranged about a respective first axis (X1, X2), the first axis (X1, X2) being parallel to the longitudinal axis (X0), and wherein the at least one tuning slot extends along its respective axis (X1, X2) to form a non-metallic area outside the non-metallic area defined by the respective first and second non-metallic region (22a, 22b). The tapering of the first and second non-metallic regions (22a, 22b) in combination with the at least one pair of tuning slots (31, 33) enables the antenna to be reduced in size, while being capable of operating over at least the UWB frequency range.
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