Investigation on Radiation Characteristics of Slotted SIW Antenna with Non-Uniform Slots in Array Configuration

The paper investigates the radiation characteristics of an array configuration of substrate integrated waveguide (SIW) antennas with non-uniform slots. The proposed antenna is intended for Wireless Local Area Network (WLAN) application. The purpose of implementing the SIW configuration is to build a compacted antenna that based on waveguides, specifically designed for low frequency ranges. The initial configuration of proposed SIW antenna applies a number of longitudinal slots incorporated at the surface of the SIW. This configuration which is designed on a 1.6 mm thick FR4 epoxy dielectric substrate with the relative permittivity of 4.4 features 8 slots arrangement. In order to investigate the radiation characteristics of substrate integrated wave (SIW) antennas constructed in a single configuration, 1×2 and 1×4 antenna arrays. These slots are implemented with non-uniform slots. From the results, it shows that the bandwidth of 341 MHz can be achieved in the frequency range of 2.294 GHz to 2.635 GHz or its (f
BW
) of 14.21%, and it produces a maximum gain value of 4.39 dBi for 1×4 arrays of slotted SIW antennas.