Abstract:

A new ultra-wideband wideslot printed antenna with an inverted π-shaped feed is introduced, which is fed by a coplanar waveguide (CPW). The characteristics of the proposed antenna are investigated both numerically and experimentally, then the return loss curve and radiation patterns of the antenna are presented. The experimental results show that the antenna has an impedance bandwidth of approximately 120% (S₁₁≤-10 dB), covering 3.0~12.0 GHz frequency range. Compared with some reported antennas of the same-type, it is noted that the size of the proposed antenna is the smallest among them.

Key words: ultra-wideband (UWB)； miniaturization； slot antenna； feed； coplanar waveguide (CPW)