Double-Layer Lightweight Linearly Polarized High-Gain Transmitarray Antenna Design at Ka-Band Based on Ultra-thin Kapton Membrane

The growing need for compact, high-gain antennas in space communication and remote sensing radar systems, particularly for CubeSat integration, has led to the development of a compact and lightweight transmitarray antenna (TA). Our novel design uses two layers of ultra-thin (0.5 mil) Kapton membrane, allowing for both low mass and easy deployment. The S-shaped metasurface geometry enables asymmetric transmission and facilitates 90° linear polarization conversion while offering full $2\mathfrak{n}$ phase coverage and maintaining high transmission efficiency for linearly polarized feed source. Simulation results indicate that the 10 cm diameter TA design can achieve 29.6 dBi directivity and 63% aperture efficiency at 35.75 GHz, showing great potential for future millimeter-wave space communication applications.