现代雷达越来越向小型化、智能化、多功能化方向发展,宽带数字化相控阵已成为雷达发展的必然趋势。文中介绍了当前的宽带数字接收机架构,中频数字化和射频数字化接收机的基本原理和发展需求。结合当前微电子技术及信号处理器件的发展,直接对射频信号进行处理已成为可能。为实现基于射频数字化的超宽带数字接收机设计,文中给出了一种基于RFSoC 技术的超宽带数字接收机设计。该接收机可实现直接射频采样和宽带任意波形产生,瞬时带宽可支持2 GHz,测试指标满足雷达、电子战应用需求。基于RFSoC 技术的超宽带数字接收机具备多通道、低成本、低功耗的优点,在雷达、电子战设备及综合射频系统中将获得广泛应用。

With the development direction of miniaturization、intelligence and multifunctionality for modern radar, wideband digital phased-array radar has become an inevitable development trend. In this paper, the structures of wideband digital receiver are introduced ,the basic principle and development demand of IF-digitize receivers and RF-digitize receivers are also presented. Based on the development of microelectronics and technologies of signal processing, RF direct sampling can be realized. An ultra wideband RF-digitize receiver based on RFSoC is designed and presented. This multi-channel digital receiver can realize 2 GHz instantaneous bandwidth direct RF sampling and wideband arbitrary waveform generation, the test result of which meets the system requirements. The design will be widely used in radar and electronic warfare system because of its low-cost and low power consumption.

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