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Impressive answer to an interesting question.

Great replies Dave.

Thanks.

Re:  If it were possible to make a radio signal almost like a laser beam, and focus it exactly so that you could capture the exact amount of energy that was launched, you would indeed have a system with zero path loss.                       

If a laser beam would cause zero FSPL how do you calculate a lesser focus like when using a directional antenna?

Thanks,

Forrest

forrest@fpsii.com

Re:  If it were possible to make a radio signal almost like a laser beam, and focus it exactly so that you could capture the exact amount of energy that was launched, you would indeed have a system with zero path loss.                       

If a laser beam would cause zero FSPL how do you calculate a lesser focus like when using a directional antenna?

Thanks,

Forrest

forrest@fpsii.com