A novel UWB antenna with dual‐stopband characteristics

A novel ultrawideband square antenna with dual band-notched performances is proposed. To obtain extended impedance bandwidth, novel techniques on the ground plane are used. Besides, the stopbands are realized by a I-shaped defected ground structure as well as a L-shaped arm ended up shorting pin on the top of the back plane. The experimental results exhibit that the antenna, with compact size 21 × 17 × 1 mm3, has an impedance bandwidth of 2.6–11.8 GHz for voltage standing wave ratio less than 2, except two frequency stopbands of 3.2–3.7, 5.1–5.9 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2741–2745, 2013