Dual antenna array for radiolocation of RCIED trigger

We describe a dual-antenna design for use in radiolocation of remote controlled improvised explosive device (IED) triggers in the 136-174 MHz frequency band. Each antenna array consists of 8 dipole-fed corner reflector antennas mounted in a circular array, radiating mainly in azimuth and elevation planes respectively. Received signal from the two arrays are downconverted to baseband using an RF front end and passed onto an FPGA for further processing. The FPGA implements an amplitude comparison algorithm to estimate the direction of arrival of the signal and returns the co-ordinates (θ, φ). We have simulated and studied the error performance of antenna as a function of angle and distance to the antenna.