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An RF transmission at which frequency has the most attenuation through free space?

A. 900 MHz
B. 2.4 GHz
C. 5 GHz
D. Some other answer

PLEASE!!! Don't explain your answer. Just post the letter appropriate to your answer. I want others to have a chance to answer without influence.

GT

OK, folks, Joe Bardwell and Connect802 are hosting a free webinar to teach this concept directly to you. The webinar will take place on Thursday August 26th at 11AM PDT/2PM EDT (GMT -5). [b][url=http://connect802.com/register]Registration[/url][/b].

[b]Debunking The Myth: 2.4 and 5 GHz Path Loss[/b]

You measure the signal strength at various distances from a 2.4 and 5 GHz transmitter. You find that the measured signal power of the 5 GHz transmitter appears to get weaker more quickly than that of the 2.4 GHz transmitter. Your measurements are correct but your conclusion is not. The difference in measured signal strength is not due to some magical property of higher frequencies that somehow makes them more dramatically attenuated at distance or through obstructions as compared to lower frequencies. Join Joe Bardwell, President and Chief Scientist at Connect802 Corporation as he lays out the exact underlying mathematics to clear the air regarding this common misconception about RF engineering. This 1 hour webinar will be followed by a live question and answer session.

Register [b][url=http://connect802.com/register]here[/url][/b].

[center][b]WOW[/b][/center]

I just signed up !