抗辐照波控单元设计与实现

Design and implementation of radiation resistant wave control unit

摘要:

在复杂的空间电磁环境下，电路受宇宙射线、单粒子的影响较大，因此器件的可靠性至关重要。反熔丝现场可编程门阵列(FPGA)是以反熔丝为基本编程结构的一次性可编程器件，编程后状态不可翻转，具有非易失性、高保密性、高可靠性、抗辐照等优势，非常适用于航天航空等领域。本文给出一种基于国产反熔丝FPGA(RS422)的抗辐照波控单元设计方案,以国产反熔丝FPGA芯片为核心，给出系统电路的工作原理、实现框图，解决空间电磁环境下雷达阵面控制问题，并进行了相关实验。实验结果表明，在5 MHz波特率下，RS422传输延迟小于码元周期，且对144单元移相组件的布相时间小于500 μs，达到设计指标要求。

Abstract:

The reliability of the device is very important in the complex space electromagnetic environment where the circuit is greatly affected by cosmic rays and single particles. Anti-fuse Field Programmable Gate Array(FPGA) is a one-time programmable device with anti-fuse as the basic programming structure. Since the state of anti-fuse FPGA cannot be reversed after programming, it has the advantages of non-volatility, high confidentiality, high reliability, and radiation resistance, which is very suitable for aerospace and other fields. A design scheme of anti-radiation wave control unit based on domestic anti-fuse FPGA is presented to solve the problem of radar array in space electromagnetic environment. The domestic anti-fuse FPGA chip is taken as the core in the proposed scheme. The working principle and realization block diagram of the system circuit are given, and relevant experiments are conducted. The experimental results show that the transmission delay of RS422 is less than the symbol period under the baud rate of 5 MHz, and the phase distribution time of the 144-unit phase-shifting component is less than 500 μs, which meets the design requirements.