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Need help to generate a 1GHz signal

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Avi-Physicist

Sun May 06 2007, 12:09PM

Registered Member #682 Joined: Sat May 05 2007, 04:16PM
Location: Israel
Posts: 10

WOW thanks very much for all your reply
I wont to do something like that:

,NuEs/lMZ0OEL72xGNYcxpav5vpA/ physscr_39_5_019.pdf
(first part of the article)
with alternating current in the coil I need as much power I can get.!!
with out burning up the coils...
BTW maybe you can recommend my a coil configuration since I have little experience on that

thanks Avi!

I forgot..
the problem with magnetron is :
1. to convert Microwave EM signal to AC
2. I cant use it as coil with AC voltage since it runs on High voltage DC
(see the link I posted for my needed experiment)

never the less I was considering putting a magnetron in the middle instead of the proposed mettle.
thanks again Avi

[Edit: double post]

thedatastream

Sun May 06 2007, 12:26PM

Registered Member #505 Joined: Sun Nov 19 2006, 06:42PM
Location: Yorkshire!
Posts: 329

A Google for "physscr_39_5_019.pdf" yields an article titled "AC High Magnetic Field Generator Using Multilayer Eddy-Current ..." but its a subscription only website.

Please can you post further details of what you want to do for those of us without access to this PDF?

James

Madgyver

Sun May 06 2007, 12:50PM

Registered Member #177 Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214

You can find it over IEEE too. I am lookiing into it, but sounds realy akward (Japanese scientist, they might be brilliant but there grammar is awful)

Edit:

Okay, from a first glance they are trying to amplify AC magnetic fields by using conductive shields. The shields act as some sort of isolation and so the maximum flux will be at cavities (or just holes) in those shields.

Or something like that....

Still they are talking about 60 to 180 Hz, nothing in the Ghz area.

Avi-Physicist

Sun May 06 2007, 01:01PM

Registered Member #682 Joined: Sat May 05 2007, 04:16PM
Location: Israel
Posts: 10

here is the PDF file
Sorry...
]1178456504_682_FT24847_physscr_39_5_019.pdf[/ file]

Mod Edit: Merged Double Post

Madgyver:
that is way I wont to do the experiment..

)
I am looking for relativistic effects

Proud Mary

Sun May 06 2007, 05:58PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

But the Japanese paper refers to magnetic fields at 60Hz, so why the need for 1GHz, at which frequency none of their calculations would have any relevance?

Avi-Physicist

Sun May 06 2007, 06:23PM

Registered Member #682 Joined: Sat May 05 2007, 04:16PM
Location: Israel
Posts: 10

If I you use higher Frq Eddi's current will be much stronger and I will get much stronger effect
(like deltea function effect)

WaveRider

Sun May 06 2007, 07:37PM

Registered Member #29 Joined: Fri Feb 03 2006, 09:00AM
Location: Hasselt, Belgium
Posts: 500

Hi Avi,
With the easy availability of good RF transistors, a 1GHz oscllator is easy to build. I have some questions, tho' (The web link that you gave previously does not work)

1. How much power do you need?
2. Do you need a stable signal (like from a PLL synthsizer for a radio) or just something to make plasma (or cook a chicken)? :)
3. How much cash do you have at your disposal?

With more info on you application, perhaps we can be more of a help to your projects...

Avi-Physicist

Mon May 07 2007, 08:16AM

Registered Member #682 Joined: Sat May 05 2007, 04:16PM
Location: Israel
Posts: 10

[quote]
Hi Avi,
With the easy availability of good RF transistors, a 1GHz oscllator is easy to build. I have some questions, tho' (The web link that you gave previously does not work)

1. How much power do you need?
2. Do you need a stable signal (like from a PLL synthsizer for a radio) or just something to make plasma (or cook a chicken)? :)
3. How much cash do you have at your disposal?

well... (the paper is in pdf I put it in time stamp " Sun May 06 2007, 03:59PM" you jest need to go up)

1. as much as I can with out burning up the coil..
2. I dont wish to mack plasma.. and I do need a stable signal.
3. lets say 3000$
Avi.

Proud Mary

Mon May 07 2007, 09:57AM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

However you manage to generate your 1GHz signal, and match and couple it into a load of some kind, your plan will be limited by the "skin effect," which at 1GHz will confine eddy currents to the top few microns of the metal. The reason the Japanese experimenters in your paper chose to use 60Hz was not for lack of a higher frequency to make things interesting, but because ELF gives the greatest depth penetration of eddy currents!

There are many beginner's guides to eddy current and skin depth calculation on the web, and perhaps you should look at these before proceeding further.

Avi-Physicist

Mon May 07 2007, 10:34AM

Registered Member #682 Joined: Sat May 05 2007, 04:16PM
Location: Israel
Posts: 10

Hmm.. thanks Harry, I will look into it.
You have a strong argument.

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