In view of the requirements of the application scenarios of the through-wall radar system

the practicality of the project is highlighted

and the components of the through-wall radar system are miniaturized. The working principle and engineering implementation method of ultra-wide band（ UWB） impulse pulse through-wall radar are introduced. The design scheme is optimized according to the requirements of the project. The echo acquisition module is designed by field programmable gate array（ FPGA） combined with high-speed analog-todigital converter（ ADC）. The equivalent sampling technique is used to reduce the real-time sampling rate

thereby reducing the design cost of radar system. Simulation on the sampling pulse generation circuit in the echo acquisition module is carried out to ensure sampling precision. Based on the traditional bowtie antenna

the antenna parameters are optimized by high frequency simulation software to reduce the physical size of through-wall radar.Based on the TCP/IP protocol

the data interaction between the handheld terminal and through-wall radar system is realized. The experimental results show that the UWB through wall radar can track and locate the trajectory of single/multiple target behind the wall.