Slotted SIW Array Antenna with Non-Uniform Slots and Its Experimental Characterization

This paper deals with the use of Substrate Integrated Waveguide (SIW) technique in the development of a slotted array antenna with non-uniform slots. The proposed antenna is intended to satisfy the demand for Wireless Local Area Network (WLAN) application. It is designed using nonuniform slots on an FR4 epoxy dielectric substrate with the dimensions of 376 mm × 43 mm and the thickness of 1.6 mm. The use of non-uniform slots aims to enhance the radiation characteristics in comparison to the slotted SIW array antenna which uses uniform slots. The results of experimental characterization show that the proposed antenna which works at the operating frequency of 2450 MHz has the measured fractional bandwidth of 7.35% (2360 MHz – 2540 MHz) comparable to the simulated result. Moreover, the results of measured radiation characteristic have similar patterns as the simulated ones showing its suitability for the desired application.