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July 20th 09, 09:35 PM
posted to rec.radio.amateur.antenna
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dB relation TX/RX
On Sun, 19 Jul 2009 07:31:01 -0700, Jitt wrote:
In article 753fee20-bfec-4b9a-81b2- , says... Hi to all, Hope that my question has some sense...: If we double the power radiated by an antenna (+3 dB), how does it translate on the S-meter at a receiver 'far' away.. i.e. is the difference in dB on that meter has some mathematical relation to the 3 dB change at the transmitter? 73 de Pierre Only in theory. It is possible to write an expression which relates an increase in Tx power to Rx antenna power at the remote site, but I doubt if it would agree with observed values in the field. If they did not - any linear mode such as SSB would have a pretty hard time working! AE5NE |
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