Conformal Holographic Impedance Metasurface Achieves Near-Field Shaped Focusing Based on Phase Conjugation

This paper designs a cylindrical conformal tensor holographic impedance metasurface to generate continuous patterned near-field shapeable fields. Based on phase conjugation technology, a left-handed circularly polarized rectangular shaped field is generated at an operating frequency of 30GHz. In order to reduce the radiation energy loss, we optimized the modulation depth of the holographic impedance modulation using the Blackman window function. It is better to verify the design that optimizes the modulation depth through simulation. The simulation results are consistent with the measured results. Experiments show that the conformal holographic impedance metasurface optimized using the Blackman window function has a better effect on realizing near-field irregular fields.