谐波雷达是一种对非线性目标进行探测和识别的系统。为了提高系统抗复杂电磁环境的能力,本文根据可变频发射谐波雷达探测系统的技术需求,提出了一种宽带谐波接收前端的设计方案。对涉及的合成扫频信号发生、基波抑制、镜像频率抑制、大动态范围宽带接收以及低噪声等关键技术进行了分析,提出了解决方案,对接收前端的关键器件给出了具体设计指标。通过对谐波雷达接收前端系统的仿真与分析,实物研制与测试,验证了方案的可行性。 Harmonic radar is a non-linear target detection and identification system. In order to improve the capability of the system against complex electromagnetic environment, this paper presents a design scheme of wideband harmonic receive front-end based on the technical requirements of variable frequency transmission harmonic radar detection system. The key technologies such as synthetic swept signal generation, fundamental suppression, image frequency suppression, wideband receiver with large dynamic range and low noise are analyzed and the solutions are proposed. The specific design indexes are given for the key components receiving the front end. Through the simulation and analysis of front-end system of harmonic radar receiver, in-kind development and testing, the feasibility of the scheme is verified.