Could you help me polish the following paragraphThe demand for high data rate wireless communications is always growing as more and more information transmitting in people’s daily life In order to fur

The demand for high data rate wireless communications is constantly increasing as more and more information is being transmitted in people's daily lives. Researchers are now exploring 6G wireless communications, which will utilize submillimeter-wave and terahertz frequencies, in order to further improve data rates. However, traditional antennas such as patch, slot, and magnetoelectric dipole antennas face challenges in efficiently operating at submillimeter-wave frequencies due to their small size and fabrication limitations. As a solution, lens antennas are being considered as a promising candidate for future 6G wireless communications, as they can generate very high radiation gain and can be easily fabricated using dielectric or metasurface materials.

However, a limitation of high-gain antennas is their narrow beam angle, which limits their coverage area. To overcome this, multibeam antennas are being employed to increase the coverage area. In microwave frequencies, beam angles can be controlled using semiconductor diodes. However, in submillimeter-wave frequencies, the strong parasitic effect at the diode junction prevents their use. To address this, researchers have introduced functional materials such as VO2 and GeTe to achieve antenna reconfigurability. In this study, we utilize GeTe materials in a cavity-backed slot antenna unit to achieve 1-bit phase reconfigurability. Subsequently, a lens antenna is constructed using the cavity-backed slot unit, enabling the generation of multibeam radiation by controlling the state of the GeTe materials