Study of a New Type of SIW End Slot Antenna at X-Band

A new type of Substrate integrated waveguide end slot antenna (SIWESA) radiating from the waveguide end of a Substrate integrated waveguide(SIW) at X-band is investigated with simulation and experiment in this paper. A novel SIW transmission line and a SIWTL end matching network are developed to transfer the energy from the coaxial line to the SIW end radiating slot. This whole antenna is fabricated on a microwave substrate with standard PCB process. The simulated results of a single SIWESA are in good agreement with the experiment ones. Furthermore, a 4-element array are fabricated and measured. The good tested results and the low-cost PCB process fabrication technology demonstrate that SIWESA is a new candidate for the phased arrays.