In this paper, researches on the development of a low probability of intercept (LPI) radar is presented. This radar was developed based on the existing frequency modulated-continuous wave (FM-CW) coastal surveillance radar at the PPET-LIPI. This LPI radar development was initiated by modifying the antenna design to produce more perfect beams, where the beams determine the detection range to be achieved. The narrower the generated beam, the greater the detection range. The beam is set by adjusting the bandwidth, the smaller the bandwidth then the greater the detection range. Reflected signals from the targets will processed by the digital signal processing sub-system and its results are shown on the plan position indication (PPI) display.