5G NR Cell Exposure Chamber for Downlink SAR Evaluation

The patent extracts only the downlink portion from the flexible 5G NR signal structure (uplink and downlink) to create a simplified signal for cell exposure experiments. This allows maintaining the essential 5G NR characteristics while significantly reducing the complexity of simulating impacts on human bodies, as downlink signals have more predictable and stable characteristics compared to the bidirectional flexible structure.

The patent applies parameter changes by scaling the power of the 5G NR signal according to the ratio of downlink symbols to total symbols in a frame. This power scaling transforms the flexible transmission structure signal into an equivalent downlink-only signal for experimental purposes, enabling accurate specific absorption rate calculations while managing device complexity through standardized parameter adjustment.

The patent employs a circular arrangement of cell containers in the radiation chamber, utilizing curved geometry to achieve uniform electromagnetic signal distribution. The circular configuration ensures that all cell containers are equidistant from the signal source, enabling even irradiation of the electromagnetic signal to all cells while maintaining a relatively simple and compact device structure.

The patent places the radiation chamber inside an incubator, creating a nested structure where the incubator provides stable temperature and humidity conditions for cell culture. This nesting approach allows long-term stable cell exposure experiments while managing energy consumption by utilizing the existing temperature and humidity control systems of the incubator, rather than requiring separate independent control systems.