Mike, > Field strength measured in V/m vs. distance from the > radiator is a > straight inverse, rather than an inverse square, > isn't it?
Yep, you are right. When field strength is measured in mv's per square meter, then it is the INVERSE square law. If mv's are measured per meter, then it is just the inverse reduction (straight line as us accountants would say). As I am thinking about all of this, I believe the inverse square law would apply to isotropic radiators, the so-called 'perfect antenna' that transmits evenly in all directions. But in the real world, almost all antennas have some sort of pattern (usually flat and to a degree circular) and it is in this instance that that the inverse reduction would occur. Idon't have the meausrement tools, but I would guess that for 100 mv at 30 meters would be roughly 1 watt at the source. Thank you for challenging me on this one, there are always new concepts to learn with radios. 73 de Joe Miller, AB8YP, Troy, MI ____________________________________________________________________________________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/ _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
