A Penta-Band Planar Horn antenna with Fan-shaped Beam Pattern

A substrate integrated waveguide (SIW) based H-plane horn antenna with fan-shaped beam pattern has been proposed for Ku and K-band applications. Three SIW-based H-plane horn antennas are joined judicially such that each arm makes an angle of 120° with the other arm to cover entire 360°. The entire structure is fed at the center using simple coaxial feeding method to excite the horn. The antenna shows a pentaband characteristic with operating bands across 16.13-16.24 GHz, 17.59-17.75 GHz, 19.37-19.64 GHz, 21.03-21.31 GHz, and 22.91-23.19 GHz, with a peak gain of 5.91 dBi at 21.17 GHz.