In response to the requirements for setting up a test, evaluation and demonstration verification environment for semi-physical radar, communication and reconnaissance RF sensors under laboratory desktop conditions, to meet the functional, performance, weight and volume indicators, research on signal propagation was carried out, typical signal propagation links were modeled, and a software and hardware system implementation scheme for a signal propagation simulator based on RFSoC chips was proposed. The simulation implementation method of modulation in the time, space, frequency and energy domains was analyzed. The measured results show that the simulator can achieve time-domain modulation in the range of 20us to 1.2ms, support the four-element interferometer direction-finding requirements in the spatial domain, frequency-domain modulation in the range of ±1MHz, and energy-domain modulation in the range of 0 to 63dB, with an accuracy of more than 90% in all cases. It can provide strong support for the construction of a laboratory desktop RF sensor test, evaluation and demonstration verification environment.