Abstract:Aiming at the problem of single event upset in the application of Static Random Access Memory(SRAM) Field Programmable Gate Array(FPGA) in spaceborne beam-steering unit, a design scheme for radiation hardened beam-steering unit is proposed based on the scrubbing control circuit. The FPGA controller XQR2V3000 is refreshed periodically by constructing the control circuit based on chip BSV2CQRH. The anti-radiation Low Voltage Differential Signaling(LVDS) interface chips are adopted to complete the code transceiver with the front management platform by LVDS communication mode. Meanwhile, the Transistor Transistor Logic(TTL) drivers are controlled to complete the update of 10 phase shifters by synchronous serial mode. The test result shows the phase distribution time is less than 50 μs when the clock is 3.125 MHz, and the falling edge of sampling pulse is located at half the length of a data symbol, ensuring data holding time long enough to sample correctly.