Proximity-Coupled Multiband Substrate Integrated Waveguide Antenna with Defected Ground Structure

In this paper, a technique of substrate integrated waveguide (SIW) is applied for designing and realizing multiband antenna. The proposed antenna is intended to satisfy the demand of wireless communication application. The antenna which is fed using a proximity coupling method and equipped with defected ground structure (DGS) is deployed by two layers of FR4 epoxy dielectric substrate with the dimension of $89\mathbf{mm}\times 68.5\mathbf{mm}$ and the total thickness of 3.3mm. The implementation of DGS incorporated at the groundplane is to achieve the antenna property in obtaining multiband frequency characteristic. From the characterization result, it shows that the realized antenna has multiband frequency response in the frequency range of 1-3GHz. The measured result was agreed well with the design one which is suitable for wireless communication application.