Low-Spurious Wideband DDS-Based Ku-Band Chirp Generator for Short-Range Radar Application

Direct digital synthesizer (DDS)-based chirp generator is a popular component in high-performance radar systems owing to its high speed and excellent chirp-linearity properties. This letter presents a 12–18 GHz DDS-based chirp generator with high spectral purity by proposing a method for planning the optimal frequencies. To verify the performance, the RF characteristics of the fabricated chirp generator were measured, and range profile measurements were performed to test the fabricated chirp generator.