In this paper, we explain the design, simulation and construction of a 2.4 GHz sector antenna using an array of 8 microstrip patch antennas with 2×4 parallel array. The antenna is designed using FR4 substrate material with dielectric constant of 4.4 (ϵr). The purpose of this study is to improve the performance of the antenna in parameters such as bandwidth, gain, directivity. The design process started with the approach of the basic characteristics of the antenna to be implemented; the overall dimensions were calculated using the transmission line model. The simulation and optimization of the calculations were carried out using the ADS simulation software, and then the physical implementation of the array proceeded. The tests were performed using the MegiQ VNA antenna analyzer, additional connectivity tests were performed by analyzing the received signal level using XBee S2B pro modules, the designed antenna was compared with commercial antennas and showed favorable results in terms of gain, directivity and line-of-sight range. The designed antenna can be used for low power IoT applications to establish point-to-point or point-to-multipoint connections with devices. The patch array allows for simple, low cost and easy to manufacture structures.