Helical phase fronts and orbital angular momentum of the vortex electromagnetic (EM) wave are applied to radar imaging at microwave frequencies and comprehensive simulations are conducted. Results demonstrate that an incrementally phased uniform circular array can be exploited to generate vortex EM wave at microwave frequencies. The imaging model based on the linear frequency modulation signal is established and the pulse‐compression and fast Fourier transform methods are used to image the target in both range and azimuth dimensions. Furthermore, antenna pattern optimisation methods for imaging are studied to enhance the directivity of the emitting signal. The work can promote the significant development of novel information‐rich radar imaging technology and provide staring imaging with substantial technical supports.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.