Car interior antennas...

[Emory Schley]

I'm certainly no expert here but a fellow I know once told me that fractal antennas were showing up in car interiors because they're efficient, quite small and don't use much material to construct. Something about punching them out with a die... didn't quite understand what he was saying completely, but fractals might be something to look into. Again, I'm unsure about this, but I think cellphones commonly use fractal antenna technology, too.
 
Emory Schley
N4LP
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[Steve Sergeant]

On 7/16/17 16:16 PM, Emory Schley wrote:
> I'm certainly no expert here but a fellow I know once told me that fractal antennas were showing up in car interiors because they're efficient, quite small and don't use much material to construct. Something about punching them out with a die... didn't quite understand what he was saying completely, but fractals might be something to look into. Again, I'm unsure about this, but I think cellphones commonly use fractal antenna technology, too.

Do you mean, like this?

[
http://ag1le.blogspot.it/2011/12/antenna-experiments-fractal-quad-for-28.html
]

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My lab partner was working on fractal antennas last time I was in
school.  The lab always reeked of acid fumes from his etching. His
lowest band was in the 10 cm range; most of his work was above that.  I
don't know if you could fit one for HF in the room you have on a window.

      GL,

          Kevin.  KD5ONS


On 7/16/2017 4:38 PM, Steve Sergeant wrote:

> On 7/16/17 16:16 PM, Emory Schley wrote:
>> I'm certainly no expert here but a fellow I know once told me that fractal antennas were showing up in car interiors because they're efficient, quite small and don't use much material to construct. Something about punching them out with a die... didn't quite understand what he was saying completely, but fractals might be something to look into. Again, I'm unsure about this, but I think cellphones commonly use fractal antenna technology, too.
> Do you mean, like this?
>
> [
> http://ag1le.blogspot.it/2011/12/antenna-experiments-fractal-quad-for-28.html
> ]
>
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[Matt Zilmer-3]

Fractal antennas are used for multi-band point of sale and similar
terminals, plus quite a number cell phones.  They are die-cut and cost
about $0.05 to make in quantity.

I had a job interview in 2009 with a POS terminal manufacturer in
Phoenix and the fractal antenna was one of the "tricks" the interviewers
threw at me.  Lame, but not everyone got it either.  Otoh, I couldn't
take the offer.

Fractal antennas' sizes are roughly proportional to a quarter wave of
the lowestfrequency used. They're not very efficient, but in Wifi and
cellular applications they usually don't need to be.

73,

matt W6NIA


On 7/16/2017 4:16 PM, Emory Schley wrote:

> I'm certainly no expert here but a fellow I know once told me that fractal antennas were showing up in car interiors because they're efficient, quite small and don't use much material to construct. Something about punching them out with a die... didn't quite understand what he was saying completely, but fractals might be something to look into. Again, I'm unsure about this, but I think cellphones commonly use fractal antenna technology, too.
>  
> Emory Schley
> N4LP
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--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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