| Summary: | Microstrip antenna technology has brought a new leading edge to wireless communication system. It is extensively utilised in many commercial and military applications today such as satellite communications, surveillance and missile guidance system. Its advantages are underlined on its geometrical characteristics, electrical performance and simple fabrication. The progressive technological advancement demands for higher antenna performance in which it has been a continual research. The optimization of antenna design is highlighted as a key to enhance performance of antenna.
The application of Electromagnetic Band Gap (EBG) structures in optimising antenna design is illustrated in this paper. It is a subset of metamaterials which has the property beyond the natural occurring materials. It can also be defined as a class of periodic dielectric, metallic and composite structures. The distinct properties of EBG has led to many research and it is of significance to the enhancement of microstrip antennas performance.
The design of a low broadband aperture-coupled grid-slotted patch antenna of metamaterial-based is referred in this project [1]. It operates in dual modes that range between 5 to 6 GHz. Furthermore, the structure comprises of a 4 x 4 patch array which has three radiating and three non-radiating slots. Three feeding techniques in microstrip antenna are also presented in this paper. Both CST and MATLAB software will be used to simulate and analyse an improved design of an aperture-coupled grid-slotted patch antenna with EBG structures. Higher realized gain, directivity, side lobe suppression and wider frequency bandwidth were attained in the final design.
|
|---|