From: Cinaed Simson Date: Fri, 14 Jul 2017 00:33:27 -0700 >> On 07/12/2017 03:56 AM, HLL wrote: [snip] > > > > The wavelength for 450 is 1.5 meters. I really don't know where the > > boundary is between near field and far field - but I would guess far > > field the other side of a full wave length. > > Opps - Andy Walls I had the numbers upside down - should have checked > the units. > > In any case, the wave length is 2/3 of meter and not 1.5 meters.
I always mentally check against the data point: 300 MHz => 1 meter (since c ~= 300 Mm/s). Above that should be less than 1m; below that should be greater than 1m. [snip] > But then power is > 116 dBm - you could probably use a paper clip soldered into a SMA > connector :). 30 dBm = 1 W = 0 dBW. IIRC. 116 dBm = 86 dBW = 10^(8.6) W = 398 MW !!! That's the sort of power that is used for time machines in science-fiction movies. You might want to check that number. :) Regards, Andy _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
