Abstract
Foldable and reconfigurable helical antennas change shape to adapt and reconfigure their electromagnetic properties. In order to realize the frequency reconfigurability of helical antennas and increase frequency bandwidth, this paper adds a spherical shell to the top of the Kresling origami, so as to achieve maximum frequency reconfiguration and electromagnetic stealth. First, the mechanical properties of the designed antenna during the smart deployment process are analyzed, which can be helically deployed, with super-large compressibility and torsion-contraction coupling effect. Then, the accuracy of the calculation method of Kresling origami-based reconfigurable helical antenna is analyzed, and its geometry is changed to control the performance parameters over time and achieve versatility. Third, the effects of the length of the metal strips and different instability configurations of the spherical shell on the frequency reconfigurability of the antenna in deployable and folded configurations are analyzed. Fourth, multi-port and omnidirectional bending and twisting are used to explore the effect of antenna geometry reconfiguration on electromagnetics. Finally, multiple antennas working at different frequencies but with similar radiation characteristics are concentrated into the same combined antenna aperture through reconstruction, so that the antenna has the capability of multi-frequency operation. Designed antenna has the advantages of compact stowage, easy deployment, light weight, enhanced electromagnetic performance, and multi-functional practicability, which can be widely used in wireless communication systems to provide various services.
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