A fourth wavelength wideband folded half U-slot microstrip patch antenna

A novel fourth wavelength Folded broadband microstrip antenna is presented in this paper. This patch antenna is used half structure technique and folded patch technique to achieve a wide impedance broadband patch antenna with small geometric size. It is employed the same parameters as the folded U-slot quarter-wave patch except with half the area and it is shown that the impedance bandwidths, radiation patterns, radiation efficiencies and gains of the half structures are comparable to the corresponding full structures.