### Wi-Fi 6 and Objectives  
Wi-Fi 6 introduces several new features, as summarized in Table 1, which compares the features of Wi-Fi 6 to Wi-Fi 5, such as orthogonal frequency-division multiple access (OFDMA), multi-user multiple-input-multiple-output (MU-MIMO), and basic-service-set (BSS) coloring, to enhance network capacity, reduce latency, and improve spectral efficiency. For multi-user support, Wi-Fi 6 leverages OFDMA, allowing for a Wi-Fi channel's subcarriers to be packaged into multiple resource units (RUs) that can be simultaneously allocated to different users, reducing collisions and competition and improving efficiency. In contrast, for OFDM, all the subcarriers in a channel can only be distributed to a single user. Wi-Fi 6 also delivers higher throughput by introducing several key improvements. First, modulation has been upgraded from 256-Quadrature Amplitude Modulation (QAM) in Wi-Fi 5 to 1024-QAM, achieving a 1.25\(\times\) increase in peak data rates. Second, the number of subcarriers has increased (e.g., 160 MHz bandwidth now provides 242 usable subcarriers), and the longer symbol duration enhances time-domain efficiency and multipath robustness. Finally, while Wi-Fi 5 supports up to four spatial streams (SS) for downlink MIMO (DL MIMO), Wi-Fi 6 expands this capability to eight SS for both uplink and downlink, significantly boosting bidirectional throughput. Since the data rate is proportional to the number of SS, Wi-Fi 6 achieves a maximum throughput of up to 9.6 Gbps, marking a substantial leap compared to legacy Wi-Fi technologies. These advancements underline the fundamental differences in the time-domain distribution of Wi-Fi 6 signals compared to previous amendments, emphasizing the need for further investigation in this area. This study fills this gap by analyzing Wi-Fi 6 DC under controlled laboratory conditions. The objectives are:  
1. Determining the DC of Wi-Fi 6 networks for seven commonly used internet applications under different bandwidths and different radio-quality conditions in single-user device (UD) scenarios;
2. Investigating the variations in DC in multi-UD scenarios with up to four UDs;
3. Examining the EMF exposure levels of Wi-Fi 6 devices under various configurations (e.g., bandwidth, location, and device count) and weighting with DC results to accurately evaluate compliance with international exposure guidelines.  
\begin{table}
\begin{tabular}{l l l} \hline
**Wi-Fi 6 [2]** & **Wi-Fi 5 [1]** & **Remarks [19; 20; 21]** \\ \hline OFDMA 1  & OFDM 2  \\ Longer PHY symbol & - & High time-domain efficiency, multipath robustness \\
1024-QAM 3  & 256-QAM & 25\% data rate improvement \\ MU-MIMO 4  & Donwlink MIMO & Up to 8\(\times\) increase in uplink throughput \\ Spatial reuse & - & Improved network capacity and efficiency \\ \hline \end{tabular}
\end{table}
Table 1: Wi-Fi 6 innovations compared to Wi-Fi 5.  
The paper is organized as follows: Section 2 presents the methodology for assessing DC, the equipment with its configuration, and the experimental setup; Section 3 demonstrates and discusses the results of the measurements; Section 4 compares the results of this study with the literature to put this study into a broader context and points out the limitations of this study; finally, Section 5 summarises the results of this study and proposes guidelines for future work.