[DX] ARRL BPL Video

[Larry, K4WLS]

Near field is widely accepted to be 1/2 wavelength
from the antenna at the operating frequency - also
known as the Freznel Zone. Chip, thought you were
an antenna man ???   Larry, K4WLS


----- Original Message ----- 
From: <Chipn1ir@aol.com>
To: <dx@mailman.qth.net>
Sent: Saturday, August 09, 2003 10:49 AM
Subject: Re: [DX] ARRL BPL Video


In a message dated 8/9/03 8:49:12 AM Eastern Daylight Time,
david.shrader@comcast.net writes:


> Well, the power to my house is 40 feet from my antenna and only 15 below
> the plane of the antenna. So, near field is the conclusion.
>
> Dave
>
>

I don't follow. Why is it near field? Why is 15 feet the appropriate
distance? How unidirectional is your antenna? What is the power pattern of
your
antenna in the near and far filed? What is your assumed model for
crosstalk/cross
mod, etc?

What modulation scheme are you assuming for BPL, that doesn't allow for
rejection of a fairly monochromatic signal, such as SSB; CW; and so on?

73,
Chip N1IR


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