I have indeed read another part of the website about FCC regulations and the fact they impose wattage limits due to the nature of 2.4 ghz RF, the stuff used by microwave ovens to cook food. I wonder about the distance that must be maintained from the cantenna?
These antennas generally transmit using very low power levels, dispersion of microwave energy outside of the relatively narrow beam is minimal or insignificant, well below recommended safety limits. Basically, don't stand in front of a directional microwave antenna. See this FCC RF Safety page (How safe are microwave and satellite antennas?) for more information on RF exposure and health effects.
Some groups claim that exposure to the low level RF from cell phones does not produce the heating effects that causes adverse health effects. We say better save than sorry.Controversy has arisen again about whether holding a cell phone next to the head for too many minutes a day threatens the brain with electromagnetic radiation. The preponderance of evidence continues to indicate there is no threat. Many people do not realize, however, that we are increasingly surrounded by technologies that emit radiation in the same radiofrequency portion of the electromagnetic spectrum: WiFi routers, Bluetooth transmitters and more. As this graphic shows, the radiation emitted in this region is nonionizing: it may heat molecules in the body but does not ionize them (that is, set electrons free). Ionizing radiation, which can tear molecules apart and therefore potentially damage DNA-is the greater worry.
Radiation from Cell Phones and Other Electronic Devices
Reduce Cell Phone Radiation Exposure
USE A HEADSET OR SPEAKER Headsets emit much less radiation than phones. Choose either wired or wireless (experts are split on which version is safer. Some wireless headsets emit continuous, low-level radiation, so take yours off your ear when you're not on a call. Using your phone in speaker mode also reduces radiation to the head. cellphone earpieces
LISTEN MORE, TALK LESS Your phone emits radiation when you talk or text, but not when you're receiving messages. Listening more and talking less reduces your exposures.
HOLD PHONE AWAY FROM YOUR BODY Hold the phone away from your torso when you're talking (with headset or speaker), not against your ear, in a pocket, or on your belt where soft body tissues absorb radiation.
CHOOSE TEXTING OVER TALKING Phones use less power (less radiation) to send text than voice. And unlike when you speak with the phone at your ear, texting keeps radiation away from your head. cellphone text
POOR SIGNAL? STAY OFF THE PHONE Fewer signal bars on your phone means that it emits more radiation to get the signal to the tower. Make and take calls when your phone has a strong signal.
SKIP THE “RADIATION SHIELD” Radiation shields such as antenna caps or keypad covers reduce the connection quality and force the phone to transmit at a higher power with higher radiation.
Find Your Cell Phone Radiation Level