 This study proposes a new approach to jamming interpulse frequency agile radars. First, the authors estimate the sub pulse width of the radar signal from its time frequency ridge and then use these estimates to construct non-uniform interrupted sampling repeaters. These repeaters are designed to jam the radar by forwarding interference signals at specific frequencies and amplitudes. This approach has been shown to be effective in reducing the jamming capability of the radar. This article was authored by Zeng Jing Sun, Ying Wikuan, and Xixing Liu.