Transmitarray for Ku Band

This paper presents in detail the design, prototyping and measurements of a transmitarray structure. The aim of these devices is to behave like an artificial lens structure (reception/transmission lens). Due to this working behaviour, the system consists of a patch array in the reception part, a phase delay for each patch and another patch array in the transmission part. The main point in using this lens-like element is to place it in front of a particular antenna in order to change the radiation pattern of the feeding antenna. The device includes a particular planar architecture (multilayer architecture) which implies the use of patches with via feeding. To avoid undesired coupling between the reception and the transmission arrays, ground planes (that isolate the reception array, the phase delay line and the transmission array) are placed. In this paper, two complete Transmitarray prototypes are analyzed, designed, simulated and prototyped. Finally, measurements of these prototypes are shown.