Abstract:A vialess polarization rotation transmission metasurface (PRTM) with high frequency selectivity is proposed, which can rotate the polarization direction of the linearly polarized incident wave by 90° and has excellent frequency selection characteristics and angular stability. The PRTM unit cell has been implemented with three metallic layers which are separated by two substrate layers, in which the top and bottom metallic layers are the polarizing grids which are perpendicular to each other. Meanwhile, the middle metallic layer is consisted of the array of dual-mode rectangular ring which is miniaturized with four patches additionally loaded at the corners. The PRTM unit cell has two cross-polarized transmission poles and one cross-polarized transmission null, where the cross-polarized transmission zero position is flexibly adjustable.Due to the introduction of the cross-polarized transmission null, the upper or lower stop band of the PRTM unit cell can be achieved with excellent frequency selection characteristics. Then the physical size parameters of the PRTM unit cell has been studied, and a set of design processes of the PRTM unit cell are summarized. Finally, two PRTM prototypes with the center frequency of 15GHz have been fabricated and measured, and measurement results were in good agreement with the simulation results.