Design and prototype of a 12-GHz transmit-array

The aim of the paper below is to present a particular antenna structure, working as a transmit-array structure (reception/ transmission lens). Because of its working function, the structure consists of a patch array in the reception part, a phase delay for each patch and another patch array in the transmission part. The idea in using this lens is to place it in front of a particular antenna to modify the radiation pattern of the feeding antenna. The architecture which is being applied implies the use of patches with probe 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 article, the phase delay part, the radiation part, and the whole structure are analyzed, designed, simulated,and prototyped. Finally, measurements of these prototypes are shown.(C) 2007 Wiley Periodicals, Inc.