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."
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Matt Zilmer, W6NIA
[Shiraz]
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