You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics will
go thru.
- Henry

Arie de Muynck schrieb in Nachricht
...
"Henry" wrote ...
Why not in metal can? You can use for example alumina. But no
ferroelectrics! (If it's a magnetic antenna)

Arie de Muynck schrieb in Nachricht
Great, an antenna working even if cast in metal....


Lookup eddy currents, skin effect depth, etc.

Placing an antenna in a _closed_ conductive box is not the best way to make
an efficient antenna. Only if the box has a slot the energy may seep though
that - but that's not in "Our tiny antenna can be placed in the car or cast
in metal, and is at least as good". I see casting in metal as a closed box.
The antenna will be shielded unless they use VERY slow changing signals.
Not
good for efficiency either.

Take a working old MW transistor radio with ferrite antenna and wrap it in
Alum foil. Make sure the edges make contact. You may puncture small holes
to
hear the sound - or rather, notice the lack of it.

Arie de Muynck

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck

I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says. "Greater
frequency requires lower mu(r)."

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?

What do you think?

- Henry



Arie de Muynck schrieb in Nachricht
...

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck

When I read this thred, I remembered about an antenna that would not need a
ground plane, This enabled celphones 65% gain from amtenna looses to body
and surroundings.

It was a cylindircal helix, very short. I understood it to be an antenna
with differential emission, coaxial electrical feild perhaps.

gagir


"Henry" wrote in message
...
I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials
or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the
wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says.
"Greater
frequency requires lower mu(r)."

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?

What do you think?

- Henry



Arie de Muynck schrieb in Nachricht
...

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck

When I read this thred, I remembered about an antenna that would not need a
ground plane, This enabled celphones 65% gain from amtenna looses to body
and surroundings.

It was a cylindircal helix, very short. I understood it to be an antenna
with differential emission, coaxial electrical feild perhaps.

gagir


"Henry" wrote in message
...
I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials
or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the
wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says.
"Greater
frequency requires lower mu(r)."

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?

What do you think?

- Henry



Arie de Muynck schrieb in Nachricht
...

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck

"Henry" wrote ..
I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials
or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the
wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says.
"Greater
frequency requires lower mu(r)."

Thanks, that at least makes some sense of the sales story.

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?
What do you think?

I'm not an expert either, I just got triggered by the nonsensical "will work
even when cast in metal" thing. I've constructed enough RF electronics to
know when even a thin layer of copper (or aluminium) will shield EMC almost
perfectly (closed box aka Faraday cage).

I checked the Norwegian patent office but they cannot afford a decent free
publication site like the US has. Do you have a link to the patent or would
you care to send a copy to (a temporary address)?

Oh yeah.... do try the experiment and be amazed...

Regards,
Arie de Muynck

"Henry" wrote ..
I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials
or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the
wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says.
"Greater
frequency requires lower mu(r)."

Thanks, that at least makes some sense of the sales story.

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?
What do you think?

I'm not an expert either, I just got triggered by the nonsensical "will work
even when cast in metal" thing. I've constructed enough RF electronics to
know when even a thin layer of copper (or aluminium) will shield EMC almost
perfectly (closed box aka Faraday cage).

I checked the Norwegian patent office but they cannot afford a decent free
publication site like the US has. Do you have a link to the patent or would
you care to send a copy to (a temporary address)?

Oh yeah.... do try the experiment and be amazed...

Regards,
Arie de Muynck

I read the patent application meantime. But I must say there is not much
content in it. Especially nothing how to calculate dimensions, materials or
taken measurements.
My understanding is that it is a helix antenna supported with a ferrite
powder rod in the axis. And it is electrical much longer than the wavelength
used. Adaption to the "ether" field Z(0) with up to 4 stages of different
winding/mu(r) value materials. A magnetical antenna very similar to the
electrical Yagi antenna. "The antenna works up to 500MHz", he says. "Greater
frequency requires lower mu(r)."

Sorry, maybe it won't work at all. I'm not an antenna expert. Maybe the
author of the patent will directly respond here sometime?

What do you think?

- Henry



Arie de Muynck schrieb in Nachricht
...

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck

"Henry" wrote
You made great interesting experiments!
The electrical field will suffer with a alumni foil, surely. Magnetics
will go thru.

You didn't do the experiment.

Regards,
Arie de Muynck