[MLB-WIRELESS] request

[paul van den bergen]

OK, that is fine, but if you want it to be efficient...???

I always thought the point was to reflect (interact with) the majority of the 
incoming polarised signal while allowing other smaller frequencies to pass 
(through the gaps) and larger frequencies to miss the antenna. By that 
rational, the smaller the gaps the more noise you should have due to less 
efficient antenna filtering.  similarly, the larger the antenna, the more 
signal you will collect, but the more resonance frequencies you will collect 
(lambda = N times the peak resonance frequency of the gaps).  However, this 
is offset by the greater collecting power (= better concentration of signal 
by directional discrimination).

so the antenna is a resonator that also acts as an amplifier and band pass 
filter...


On Mon, 23 Dec 2002 05:40 pm, you wrote:
> Hello paul,
>
> pvdb> Iv'e been meaning to ask... could someone with one of these measure
> the wire pvdb> thickness and gaps?  I can do the parabola bit, it's the
> spacign for pvdb> filtering that I don't know....
>
> Isn't it just smaller then 1/4 wave?

-- 
Dr Paul van den Bergen
Centre for Advanced Internet Architectures
caia.swin.edu.au
pvandenbergen at swin.edu.au
IM:bulwynkl2002
would somebody get this big walking carpet out of my way?

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