in this paper a new low profile substrate integrated waveguide (siw) probe-fed h-plane horn antenna structure with improved gain is proposed. the proposed antenna consists of two waveguides including a rectangular and a taper one, in which both, first and third modes of the structure are simultaneously excited leading to a uniform field distribution along the radiating aperture of the antenna a...

In this paper, a conical horn antenna in the presence of metamaterial lens X-band is introduced and fabricated. The annular located at aperture shortened antenna, whose length half corresponding optimum horn. phase velocity more than along axis for same propagation distance, so distribution uniform gain increases. Metamaterial cells are designed form printed circuit board that have easy to buil...

An ultra-wideband antenna with a conical ground and trident inset feeding structure is presented. The consists of U-shaped monopole designed on printed circuit board three-dimensional aluminium mold, serving as the ground. Low frequency (<; 1 GHz) matching achieved feed branches by inserting them into monopole. Simulation studies show that proposed 3-D outperforms horizontal or flat-lying model...