Performance Analysis of 2.4 GHz Slotted Substrate Integrated Waveguide Array Antenna

Performance analysis of 2.4 GHz slotted substrate integrated waveguide (SIW) array antenna is presented in this paper. The SIW structure allows us to create more compact shape of a waveguide-based antenna at low frequency. Several configurations of longitudinal slot array on SIW have been designed and simulated using FR4-epoxy substrate with relative permittivity of 4.4 and loss tangent of 0.02. The radiation performances of each configuration, e.g. gain, width of main lobe (WML), and side lobe level (SLL) are observed and analyzed. A5dB target gain is achieved by an array of 16 slots, with 4-by-4 array configuration.