  6DMA (six-dimensional movable antenna) is a new and revolutionizing
technology that fully exploits the wireless channel spatial variation at the
transmitter/receiver by flexibly adjusting the three-dimensional (3D) positions
and 3D rotations of distributed antennas/antenna surfaces (arrays). In this
article, we provide an overview of 6DMA for unveiling its great potential in
wireless networks, including its motivation and competitive advantages over
existing technologies, system/channel modeling, and practical implementation.
In particular, we present a variety of 6DMA-enabled performance enhancement in
terms of array gain, spatial multiplexing, interference suppression, and
geometric gain. Furthermore, we illustrate the main applications of 6DMA in
wireless communication and sensing, and elaborate their design challenges as
well as promising solutions. Finally, numerical results are provided to
demonstrate the significant capacity improvement of 6DMA-aided communication in
wireless network.
