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Relative permittivity of Gold at a frequency of 104 MHz

Posted Dec 3, 2015, 9:12 a.m. EST 3 Replies

Nadia Aloui
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Hi,

I need the value of the relative permittivity of Gold at a frequency of 104 MHz. I found values at optical wavelengths.
Thanks.

Best regards,
Nadia
3 Replies Last Post Dec 4, 2015, 4:12 p.m. EST
Edgar J. Kaiser Certified Consultant
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Posted: 9 years ago Dec 3, 2015, 1:24 p.m. EST
Hi Nadia,

the relative permittivity of gold (and most metals) at 104 MHz is pretty meaningless because the skin depth is less than a micrometer.
What exactly do you think you need it for?

Cheers
Edgar

--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Hi Nadia, the relative permittivity of gold (and most metals) at 104 MHz is pretty meaningless because the skin depth is less than a micrometer. What exactly do you think you need it for? Cheers Edgar -- Edgar J. Kaiser emPhys Physical Technology http://www.emphys.com
Nadia Aloui
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Posted: 9 years ago Dec 4, 2015, 11:25 a.m. EST
Dear Edgar,

Thank you for your reponse.
It is used for SAW (Surface Acoustic Wave) sensor. The interdigitated electrodes and the sensing zone are covered with Gold.

Best regards,
Nadia.
Dear Edgar, Thank you for your reponse. It is used for SAW (Surface Acoustic Wave) sensor. The interdigitated electrodes and the sensing zone are covered with Gold. Best regards, Nadia.
Edgar J. Kaiser Certified Consultant
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Posted: 9 years ago Dec 4, 2015, 4:12 p.m. EST

Nadia,

I assume that the gold coatings are much thicker than the skin depth at 104 MHz. So an impedance BC would typically by sufficient for the electrodes.

Cheers
Edgar

--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Nadia, I assume that the gold coatings are much thicker than the skin depth at 104 MHz. So an impedance BC would typically by sufficient for the electrodes. Cheers Edgar -- Edgar J. Kaiser emPhys Physical Technology http://www.emphys.com

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