For next-generation mobile communications, the application of millimeter wave bands is being explored for high-speed and large-capacity communications. However, coverage holes occur because millimeter waves are found to be blocked by objects. To overcome this problem of coverage holes, we have developed a reconfigurable liquid crystal metasurface reflector by applying thin film transistor liquid crystal display technology. The developed reconfigurable liquid crystal metasurface reflector was designed to operate at 28 GHz, and the measurement findings confirmed that the reflection phase control range was 260° and exhibited equivalent reflection characteristics for both vertical and horizontal polarization. Furthermore, the reflection direction control function was confirmed by varying the reflection direction between 0° and 60° with several phase distributions.
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