A new wideband differentially-driven microstrip antenna with H-shape slot and U-shaped ground

We introduce a new microstip antenna with the use of H-shape slot .we make use of the higher order mode radiation in addition to the intrinsic domain mode, yielding a very wide impedance bandwidth, which can reach to about 50%. Most importantly, with the use of a U-shaped ground, we can make the gain more stable, which is very important in modern devices.