This study aims to utilize additive manufacturing technology to realize the proposed smart system, which is based on a lightweight design and has the capability of wireless signal tracking. The system focuses on the design of the directional dual-antennas mechanism and endows it with control logic to automatically track wireless signals. First, the mechanism design of the dual-antennas can find the position of the signal more efficiently. Secondly, the control strategy considers the conditions of multiple angles and distances, so a dynamic threshold is designed to make the control more robust. The experimental results show that the best performance is achieved when the distance between the dual-antennas mechanisms is 0.04 m. Further, the performance at different angles and distances is also satisfactory. The best results are obtained when the distance between the receiver and the transmitter is 0.5 m, with an R-squared value of 0.9989, an RMSE of 1.8615, and an SD of 1.3045. In future research, more in-depth testing will be continued, and then its performance will be verified in the factory, while it can be applied to material tracking and positioning.