The power usage for receiving and reading five emails, and replying to two of them, is as follows: The power consumed is measured by multiplying the voltage supplied and the current drawn during that specific task. Mobile data and Wi-fi were alternately used to perform the aforementioned tasks. Two other devices, HTC Dream and Google Nexus One were used to validate the initial observations on Freerunner. The device used was OpenMoko Neo Freerunner. These scenarios included emailing, downloading random data, and web browsing. To establish the disparity of power consumption between GSM and Wi-Fi, some typical usage scenarios were simulated. Meta-Analysis: Wi-fi Versus GSM Power Consumption To ensure that the signal strength doesn’t wane, more power is required at the transmitter, which comes at a cost to the battery. Thus, doubling the distance between the antennas decreases the power output by four times. Power output at the receiver antenna drops by the inverse square of the distance from the transmitter. This energy is provided by the phone’s battery. Thus, it is evident that energy is used when transmitting and receiving data. This electronic oscillation creates an AC current in the receiving antenna, which is then converted to a suitable form (sound, video, text, etc.). When EM waves strike the antenna, the electrons absorb energy and start oscillating at the same frequency as that of the incident waves. The receiver also contains a long, thin conductor. Any receiver within range (Image Credit: pxhere) EM waves propagate in all directions from the antenna.
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