A double helix coaxial pulse compression structure

Based on simultaneous interpreting of double coaxial structures, the middle cylinder is designed as a helical structure in order to achieve longer output pulse under the same transmission line length. The full wave simulation shows that the pulse width can be effectively increased by increasing the number of middle cylinder spirals, but too many middle cylinder spirals will lead to the deterioration of waveform flat top. Based on the reasonable selection of the spiral number of the middle cylinder, the waveform shaping can be realized by further adjusting the spiral number of the inner cylinder.