An overview of recent antenna array designs for highly-integrated 60-GHz radios

Following the description of basic antenna specifications for 60-GHz wireless personal area network applications, we make an overview of recently-reported antenna array designs for emerging highly-integrated 60-GHz radios in this paper. We reveal that most designs suffer from the complex feeding networks and require sophisticated process techniques to achieve enhanced performance because of improper choice of radiating elements. To avoid these problems, we revive the grid array antenna design and report some preliminary but promising results.