On 07/14/2017 07:13 AM, Andy Walls wrote: > 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. :)
Opps again - I meant 116 mW. I'm blaming these errors on dog. > > > Regards, > Andy > > > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
