Commit b39398a0 authored by Tran Huy Vu's avatar Tran Huy Vu

Add text in Duty Cycle

parent a32d69dc
......@@ -83,8 +83,7 @@ C is the capacitance of the super capacitor in Farad (we use a 0.47F capacitor),
\label{fig:dutycycle}
\end{figure}
The AP is not transmitting power all the time. In real AP, it must
transmitt usual data aswell. Show duty cycles of 40\%, 60\% and 80\%
Although we can use the AP as a wireless charger, which transfers energy to the device all the time. We are keen to see if it is possible to be part of a commercial AP in the future. With real AP, the main function is to transmit and receive data. However, it not always fully loaded, and thus can exploit free time to transfer power to nearby device. We place a device at the edge of the table in the experiment room (See Figure \ref{fig:exprsetup}). The position is XXX meter from the AP. We set the AP to transfer charging signal at different duty cycle from 20\% to 100\%. The voltage level of the super capacitor is then measured before and after each session. The residual energy is reported in Figure \ref{fig:dutycycle}. It is quite clear that the residual power is approximately linear with the duty cycle. Moreover, with only 20\% time, the AP can transmit about 50 \micro W more than the required power for the wearable to work.
\subsection{Effect of Number of Antennas}
\begin{figure}
......
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