Miniaturization of 2.4GHz SIW Antenna using Complementary Split Ring Resonator

This paper discusses the miniaturization of substrate integrated waveguide (SIW) antenna with complementary split ring resonator (CSRR). The proposed antenna is intended to operate at the frequency of 2.4GHz for wireless local area network (WLAN) application. The antenna which is fed using a microstrip line feeding technique is designed on an FR4 epoxy dielectric substrate with the relative permittivity of 4.2 and the thickness of 1.6mm. To demonstrate the size miniaturization, a conventional SIW antenna without CSRR is also designed using the same dielectric substrate to operate at the same resonant frequency. Characteristics of both antennas are then compared each other in terms of physical size, return loss, VSWR, gain, and radiation pattern. From the result, it is shown that the incorporation of CSRR can achieve the miniaturization of conventional SIW antenna up to 59.2%.