Designing multiband multilayered microstrip antenna for mmWave applications

Due to the increasing interest in millimeter wave spectrum regions in the next generation of communication systems, there is a need to analyze and design antennas appropriated for this purpose. Microstrip antenna array with a multi-layer structure is a potential candidate. The antenna should work in a wide spectrum interval and should be multiband. The proposed antenna system consists of three layers. In the middle layer, there are two rectangular microstrip patches, which are fed by an electromagnetic coupling through some slots from the bottom layer. On the top of the patches, a gridded structure with 6×3 rectangular microstrip patches is built to enhance the gain. This paper calculates the antenna system with a commercial software package. The calculation results show the antenna system operates in three frequency bands in the spectrum range of 40 GHz - 80 GHz. The gain obtained in the simulation is about 8.65 dBi.