Microstrip Transmitarray Antenna with Three Layered 5x5 Crosslet and Square Slot Patches at 38 GHz

This research aims to design a transmitarray antenna. The three layers of Crosslet and square slot in 5×5 array is designed and tested for 38 GHz frequency. In the design, we exploit the phase characteristics of the transmission coefficient through the whole structure. A phase shift of up to 233° can be achieved by variation of the length of the Crosslet and the square slot. The antenna size of 20 mm x 20 mm was fabricated using Roger RT4003C and measured. According to the simulation results, a gain of 23.29 dBi is obtained oriented to the horizontal direction as expected from the design view of the point.