可展收的新型超轻质角反射器设计  

Design of a novel ultra lightweight deployable corner reflector

作　　者：宗亚雳 李帅鹏 马昕宇 杨癸庚 弓明豪 ZONG Yali;LI Shuaipeng;MA Xinyu;YANG Guigeng;GONG Minghao(Northwestern Polytechnical University,Xi’an 710129,China;Xi’an University of Technology,Xi’an 717048,China;Xidian University,Xi’an 717017,China)

机构地区：[1]西北工业大学,西安710129 [2]西安理工大学,西安717048 [3]西安电子科技大学,西安717017

出　　处：《电波科学学报》2023年第6期997-1006,共10页Chinese Journal of Radio Science

基　　金：国家自然科学基金(51705423);陕西省自然科学基础研究计划(2020JQ-188)。

摘　　要：雷达角反射器在雷达对抗领域中具有后发制人的作用,能够干扰敌方雷达的探测,保护己方重要设施.传统角反射器多利用金属板材作为反射面制成,虽具有强反射的功能,但其质量较大,一旦加工成型,其形状和尺寸固定、散射特性单一,因此,逐渐不能满足日趋复杂的应用需求.本文针对上述问题,综合考虑角反射器的质量、散射特性及其可调控性等,提出了一种新型、超轻质、雷达散射截面积(radar cross section,RCS)可调的雷达角反射器结构设计方法.该方法以高结构强度的碳纤维杆为支撑骨架,以大柔性金属丝网为角反射器反射表面,并进行结构展开-收拢功能设计,使之可在不同结构状态间连续变化,以实现RCS调控的目的.为验证该设计方法的可行性与有效性,研制了1 m口径12单元可展收角反射器阵列样机,该新型雷达角反射器质量仅1.325kg,并可顺利通过展收状态切换调控RCS,且便于其装载和运输,适合多种载体平台使用.经过实验测试验证,其可实现RCS大幅调控,在2~20 GHz频段内的多数频段可达10 dBsm以上的调控幅度,在少数频段内幅度可超过30 dBsm,取得了良好的调控效果.本文设计方法可为超轻质、散射特性可调的角反射器的设计提供参考.Radar corner reflector plays an role of post-strike in the field of radar countermeasures,which can interfere with the detection of enemy radar and protect important facilities of one’s own side.The traditional corner reflector is made of metal plate as the reflecting surface.Although it has the function of strong reflection,its weight is larger.Once it is processed and formed,its shape and size are fixed and the scattering characteristics are single.Therefore,it cannot meet the increasingly complex application requirements.In order to solve the above problems,a design method of novel ultra-lightweight radar corner reflector structure with adjustable radar cross section(RCS)is proposed by considering the weight,scattering characteristics and adjustability of the corner reflector.The method uses carbon fiber rods with high structural strength as the supporting frame and large flexible wire mesh as the reflecting surface of the corner reflector.The structure is designed with the function of unwrapping folding,so that it can be continuously changed between different structural states,so as to achieve the purpose of RCS regulation.In order to verify the feasibility and effectiveness of the design method,a 1m aperture 12-unit deployable corner reflector array prototype was developed.The novel radar corner reflector has a weight of only 1.325 kg,and can regulate RCS smoothly through the deployable state switch,and is easy to be loaded and transported,which is suitable for a variety of carrier platforms.After experimental testing,it can achieve substantial regulation of RCS.More than 10 dBsm regulation amplitude can be reached for most frequency bands in the 2−20 GHz band,and it can exceed 30 dBsm for a few frequency bands,which proves that the regulation effect is good.This design method can provide reference for the design of ultra-lightweight corner reflectors with adjustable scattering characteristics.

关 键 词：角反射器 超轻质 RCS调控 金属丝网反射面 结构可变 

分 类 号：TN974[电子电信—信号与信息处理]