A novel, space-time coding antenna promotes 6G and secure wireless communications

https://phys.org/news/2022-12-space-time-coding-antenna-6g-wireless.html

"waveguide and successfully suppressed the undesired harmonics, achieving a high-directivity beam and enabling secure communication... controlling on-off sequences and duration of switches through software... high-directivity beam... wide range of radiation performance without having to redesign except for using different STC inputs... can be focused to focal point with fixed or varying focal lengths... real-time imaging and radar... smaller integrated circuits at lower cost and in a wider range of applications"

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