This article presents a novel digitally reconfigurable conformal array using the multimode control and metasurface phase compensation. The digital conformal array consists of a 1-bit multimode radiator, metasurfaces, ...
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This article presents a novel digitally reconfigurable conformal array using the multimode control and metasurface phase compensation. The digital conformal array consists of a 1-bit multimode radiator, metasurfaces, and switch designs. By manipulating the field distributions of the transmission line (TL), a miniaturized multimode radiator is explored. Next, a low-cost 1-bit planar digitalarray without any feeding networks is proposed by coding the 0 degrees/180 degrees phase states of each mode/element. To match the circular/cylindrical/spherical scenarios, the planar digitalarray evolves into a conformal format. Here, to further lower the complexity and cost, the spatial phase difference of the digital conformal array is cleverly compensated by utilizing a metasurface layer rather than conventional phase-delay-line designs. By controlling the 1-bit phase states of each element, the radiation aperture of the digital conformal array is represented as a "0/1" binary sequence, which leads to an RIS-like multibeam switching capability. Moreover, by introducing the initial phase, a new 1-bit digitalarray with a single-beam steering capability is extended to further explore its application potential. To validate the concept, a four-element 1-bit digital conformal array was fabricated and measured. The digital conformal array could achieve a -10 dB impedance bandwidth of 4.74-5.12 GHz (7.7%) and a peak gain of 11.0 dBi, which makes it a good candidate for intelligent wireless communication and detection applications.
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