# Radar Transceiver용 X-밴드 PLL 주파수 합성기 설계 및 제작

• Lee, Hyun-Soo (Dept. of Electronic and Communication Eng. Korea Maritime University) ;
• Park, Dong-Kook (Dept. of Electronic and Communication Eng. Korea Maritime University)
• 이현수 (한국해양대학교 전자통신공학과) ;
• 박동국 (한국해양대학교 전자통신공학과)
• Published : 2005.11.05
• 57 13

#### Abstract

A frequency synthesizer of 10 GHz $\sim$ 11 GHz for FMCW radar is designed and implemented by the form of indirect frequency synthesizer of a single loop structure. The synthesizer uses a high speed digital PLL chip. It is difficult to divide directly by using a program counter of PLL chip because the output frequency of VCO is 10 GHz $\sim$ 11 GHz, so we lower the frequency to 625 MHz $\sim$ 687.5 MHz by using a prescaler, and then divide the frequency by the program counter. The output frequency sweep of VCO from 10 GHz to 11 GHz is measured.