Ultra-wideband printed wide-slot antenna with an inverted π-shaped feed

A new ultra-wideband printed wide-slot antenna with an inverted π-shaped feed fed by a coplanar waveguide (CPW) is introduced. The experimental results show that the antenna has an impedance bandwidth of approximately 120% (VSWR ⩽ 2) , covering 3.0∼12GHz frequency range. Comparing with some reported same-type antennas, it is noted that the size of the proposed antenna is the smallest one of them.