A three-dimensional printed beam-steering reflector surface with dielectric fluids as the tuning agent is presented. The reflector is made using ECO-ABS with six rows of 19 parallel channels of square cross-sections. The permittivity of the ECO-ABS was measured at 2.55 with a loss tangent of 0.053. A conductor is placed at the back of the dielectric. The squared channels are filled with either distilled water or air. The effective permittivity within the reflector changes according to the material used to fill the channels. As an incident wave propagates through the printed dielectric, the configuration of air–water channels shapes the exiting phase front of the wave by locally controlling its phase delay. The resulting phase profile created by the air–water configuration leads to a steered beam. Numerical full-wave simulations show steerable angles ranging from ${-}{42^ \circ}$ to 23° for a set of air–water configurations at 30 GHz. A prototype was fabricated and tested for the same configurations. Experiments confirm a wide range of angles starting at ${-}{40^ \circ}$ up to 20°.

中文翻译：

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使用介电液的3D打印毫米波束转向反射器

提出了一种以介电液作为调节剂的三维印刷光束转向反射镜表面。反射器使用ECO-ABS制成，具有六排19个平行的方形横截面通道。经测量，ECO-ABS的介电常数为2.55，损耗角正切为0.053。导体放置在电介质的背面。方形通道充满蒸馏水或空气。反射器内的有效介电常数根据用于填充通道的材料而变化。当入射波传播通过印刷介质时，空气-水通道的配置通过局部控制其相位延迟来塑造波的出射相前。空气-水的配置所产生的相位分布图导致了转向光束。将{{-} {42 ^ \ circ} $设置为23°，以获得30 GHz的一组空气-水配置。制造了原型并测试了相同的配置。实验证实，从$ {-} {40 ^ \ circ} $开始到20°的各种角度。