Kaan: We had a similar problem here and anlysis shows that the field intensity directly under the antenna is very very low and maximum radiation will be a function of output power and antenna gain. Many cellular repeaters operate at the 100w level to antennas with perhaps 15-16dB gain.
The ideal coverage pattern would be circular with field intensity greatest in a plane perpendicular the the antenna, in a horizonatl direction. Providing the antennas are at a height above the school.and are not aimed or in line with any classrooms where humans would be, one would have to be in the boresight( i.e at antenna height and in the plane of max. radiation to even consider being a health hazard. If the school board consults a communication specialist, he could ally any fears as to the potential for health risk. In our local case, it was the community that raised concerns but the measured radiation ws very minimal. Ralph Cameron EMC Consultant for Suppression of Consumer Electronic Equipment (After Sale) ----- Original Message ----- From: "Jim Bacher" <[email protected]> To: <[email protected]>; <[email protected]> Cc: <[email protected]>; <[email protected]> Sent: Friday, May 05, 2000 5:02 PM Subject: Re:Cellular Phone Repeater RF Safety Questions... > > Forwarded for [email protected] .... Jim > > ____________________Reply Separator____________________ > Subject: Cellular Phone Repeater RF Safety Questions... > Author: [email protected] > Date: 5/5/00 2:03 PM > > > > Hello Group, > > This message is being sent to the group on behalf of a fellow engineer, > please respond to [email protected]. > > I am looking for information regarding the power output levels and > potential related biological effects from the RF fields produced by cellular > phone repeaters. The reason for doing this is that a local school board is > considering allowing the installation of a cellular repeater system that will > utilize three separate antennas. These antennas will be placed at various > locations on the roof of the elementary school building, with classrooms > directly below the antennas. I am concerned for the safety and long term health > of the children as it relates to the long term exposure (4 to 6 hours each > school day for up to seven years) to the RF fields that will be present in their > classrooms as a result of the cellular phone repeater and antennas being > installed. > Your input is greatly appreciated. > > Thank you, > > Kaan Gregersen > Rick Giles > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
