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In this study, a novel axe‐shaped ultra‐wideband (UWB) antenna with low‐backscattering radar cross‐section (RCS) is designed. The designed UWB antenna bandwidth is 3.4–15.5 GHz covering the entire band assigned for the UWB applications. The RCS of the designed antenna is reduced by modifying the geometrical shape. This technique is based on the subtraction of the metal areas which have the minimum current distributions on the surface of the printed antenna. Therefore the backscattering RCS of the modified axe‐shaped UWB antenna is reduced up to 10 dB in the whole frequency band while maintaining the radiation performance. The size of the antenna is 0.32λl ×0.39λl, where λl is the wavelength at the lower operation frequency and the fractional bandwidth is 128%. The radiation patterns, scattering characteristics and the RCS of both the modified and reference axe‐shaped UWB antennas are simulated and experimentally verified. The simulation and measurement results are in a good agreement.

A miniature ultra-wide band (UVB) antenna is presented. The size of the antenna is 17 mm  18 mm  1.575 mm. The antenna radiates at 3.4-20 GHz. The bandwidth of the antenna almost covers the entire UVB of 3.1-10.6 GHz. The size of the antenna is very small. The proposed antenna is fabricated and measured. The experimental results are in a good agreement with the simulated results. V C 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 23:494-498, 2013.

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