Phase Corrected Substrate Integrated Waveguide H-Plane Horn Antenna with Dielectric Loading

The phase distribution of the electromagnetic field in the horn antenna is usually not uniform throughout the horn aperture, resulting in a lower gain. In this paper, the concept of phase correction, along with impedance matching, is presented. A coaxial-fed, Substrate Integrated Waveguide (SIW) based H plane horn antenna is proposed for the X band. The SIW horn antenna is splitted into three sub-horn structures for phase correction by etching slots on the horn surface. To improve impedance matching extended substrate is used. The overall size of the proposed antenna is 51×40×0.79 mm3, designed on RT- duroid 5880. The proposed antenna is compact having a maximum gain of 8.1 dB, whereas the maximum gain of a traditional horn antenna is 0.597 dB.