Design and Realization Step Frequency Continuous Wave Generator for Ground Penetrating Radar Using Phase-locked Loop

Ground Penetrating Radar (GPR) is a system that uses the radio wave to detect ground surface or buried object with a certain distance without ruin the soil. One of GPR applications uses the Step Frequency Continuous Waves (SFCW) signal which has a wide bandwidth that is needed to detect a high-resolution object or subsoil structure. Ideally, GPR has a working frequency that can be adjusted as needed by using a programmable signal generator. In this research, a SFCW signal generator was designed and realized using the implementation of Phase Locked-loop (PLL) ADF4351 which is controlled by the Arduino UNO micro controller. The signal generator in this research generates SFCW signals in the frequency range 500 MHz-1500 MHz. Experiments were conducted with the number of steps frequency 8, 16 and 32 times. The measurement results for each step frequency show the power varies between -10.41 dBm up to -2.9 dBm.