Design and application of ultra-thin focus transmitarray

An ultra-thin transmitarray (TA) working at 10 GHz with bandwidth of 1.15 GHz is proposed. The TA is designed by arranging two types of phase-shifting cells, with a thickness of only 2.8 mm (0.09 lambda (0)). The proposed focus TA has an obvious convergence effect for plane wave. It enhances the electric field intensity by 11.85 dB at the focus and can also transform the incident spherical wave into the plane wave. When a substrate cylinder antenna is loaded with the proposed TA, it reaches a peak gain of 17.8 dBi (increased by 8.8 dB) and its half-power beamwidth is reduced from 84 degrees to 11 degrees. The TA is fabricated and measured. The measured results are highly consistent with the simulated results, which validates the good performance of the TA.

Automated summary

An ultra-thin transmitarray (TA) operating at 10 GHz, with a bandwidth of 1.15 GHz, is proposed in this study. The TA consists of two types of phase-shifting cells and has a thickness of only 2.8 mm (0.09 lambda (0)). It demonstrates a significant convergence effect for plane waves, enhancing the electric field intensity by 11.85 dB at the focus and transforming incident spherical waves into plane waves. When the TA is integrated with a substrate cylinder antenna, the peak gain increases by 8.8 dB to reach 17.8 dBi, while the half-power beamwidth reduces from 84 degrees to 11 degrees. Fabrication and measurement of the TA show a high consistency with the simulated results, validating its excellent performance.