Wireless source direction finder

Abstract

The project is able to detect and specify the direction of any wireless source within a certain range and sector. Using specific frequency modules, the wireless source is detected with maximum accuracy in least time. The distance from the source is calculated based on difference in power levels of the two receivers. The resultant relative position of the source will be displayed on screen after the processed signals are coded through programming tools. Geometrical analysis technique of trilateration is employed in our coding. A rotating mechanism may also be employed to make the device rotate and detect from all direction within the specific sector. For our radio frequency direction finding, we designed three wireless modules operating at frequency of 2.4 GHz. The two used receivers give us two different received power levels. Based on that difference, our IC will calculate the location of the source relative to the receiving antennas. The final results (coordinates/angle) will be displayed on LCD. This project can be enhanced by adding a GPS interface for worldwide usage. Also, this project’s concept can be employed with other frequency bands and increase the range as per the requirements.