杨柳，夏雨，刘冬平，等.基于时间调制阵列的全向宽带测向方法[J].电波科学学报，2023，38（1）：130-136.DOI:10.12265/j.cjors.2022097YANGL,XIAY,LIUDP,etal.Omnidirectionalbroadbanddirection-findingmethodbasedontime-modulatedarray[J].Chinesejournalofradioscience，2023，38（1）：130-136.（inChinese）.DOI:10.12265/j.cjors.2022097基于时间调制阵列的全向宽带测向方法杨柳夏雨刘冬平贺冲陈靖峰*金荣洪（上海交通大学电子工程系,上海200240）摘要为解决时间调制测向技术中由线型阵列对称性和固定基线长度引入的目标前后向模糊问题和测向带宽受限问题，提出了一种基于五单元时间调制阵列的全向宽带测向方法.通过将一维线型阵列扩展为二维平面阵列，提高空间自由度以区分来波前后向；进一步结合虚拟基线技术，利用相邻单元排布间距的差异性引入虚拟相位差，解决工作频率变化引起的相位差模糊问题，从而实现全向宽带测向的目标.通过数值仿真在3倍频程工作带宽条件下有效实现了360°全向测向，验证了所提出方法的可行性.关键词时间调制阵列；虚拟基线；全向测向；宽带测向中图分类号TN821.1文献标志码A文章编号1005-0388（2023）01-0130-07DOI10.12265/j.cjors.2022097Omnidirectionalbroadbanddirection-findingmethodbasedontime-modulatedarrayYANGLiuXIAYuLIUDongpingHEChongCHENJingfeng*JINRonghong（DepartmentofElectronicEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China）AbstractTosolveproblemsofthefront-to-backambiguityandthelimitedbandwidthrespectivelyinducedbythesymmetriclineararrayandthefixedbaselineinthedirection-findingmethodwithtime-modulatedarray(TMA),anomnidirectionalbroadbanddirection-findingmethodwithfiveelementTMAisproposedinthispaper.Byextendingthelineararraytoaplanararray,anewspatialdegreeoffreedomcanbeprovidedtodistinguishthefront-to-backoftheincidentwaveinthispaper.Furtherincorporatingthetechnologyofthevirtualbaseline,thevirtualphasedifferencecanbeintroducedbythedifferencesofbaselinestosolvethephasedifferenceambiguitycausedbythefrequencyvariationandachievethegoalofomnidirectionalbroadbanddirectionfinding.Numericalsimulationsareperformedtoeffectivelyrealizedirectionfindingwithin360°undertheconditionofathreeoctaveworkingbandw...
