Perhaps. If so, go into your network connection's settings, into the advanced settings, and disable power saving. Then test again.

Assuming you're talking about WiFi. If the 3G/2G antennas use power saving, I can't really say. With WiFi, I think you're better off just disabling power saving, as that will spend less power then keeping the wifi card working all the time in spite of power saving, AND pinging non-stop at the same time.