[SI-LIST] Re: Determination of relative permittivity

Look on the NIST web page, you should be able to find all the information
you need there.

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Kai Keskinen
Sent: Wednesday, May 25, 2005 4:46 PM
To: matthias-bergmann@xxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Determination of relative permittivity


I've lost the reference to an old microwave book that explained the cavity
resonance method. One method was to make a disk of the material of a certain
thickness that was the same radius as a cylindrical microwave cavity. You
measured the resonant frequency and cavity Q before the disk was inserted
and after the disk was inserted into the bottom of the cavity. The change in
f gave you the dielectric constant and the change in Q gave you your loss
tangent. I can't remember the equations to relate delta fr and delta Q to Dk
and tan delta. Does anyone else remember this technique? The cavity was
cylindrical with a side launch from rectangular waveguide.

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Matthias Bergmann
Sent: Wednesday, May 25, 2005 7:32 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Determination of relative permittivity


Hello,

quite a lot of discussions deal about the (effective) permittivity, but how
do I determine it ?
I would like to measure the complex permittivity of synthetic materials in
a frequency range between 1 till 500 MHz. I know there are methods like
Parallel plate,
Reflection wave, S Parameters or Cavity  to measure it, but, it's sort of
weird,
I didn't find any paper which explains how to construct a measurement
system.
So, are there any basic papers or books you can recommend me ?

Best regards, Matthias Bergmann

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu




------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu


------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: