Presentation | 1999/4/23 Microwave measurements of Low-Temperature dependences of complex permittivity of MgO and BMT substrates. Toru Hashimoto, Satoshi Kamijyou, Hiromitsu Itamoto, Yoshio Kobayashi, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | This paper presents measured results of low-temperature dependence of the complex permittivity (ε_s, tanδ_s) of MgO and Ba (Mg, Ta, Sb) O_3 ceramic substrates for High-T_c superconductibe thin films by using a circular cavity resonance method. At the room-temperture, the results of MgO substrates measured at 14~16GHz are ε_s=9.85 within the precision 0.2% and tanδ_s=7.8×10^<-6> within the precision 6.4%. Moreover, the measured results below 100K about 14GHz are ε_s=9.6~9.7 and tanδ_s<1.0×10^<-6>. Many MgO substrates in a lot have almost the same values of ε_s and tanδ_s, but the plates in the different lot have different ε_s and tanδ_s. When we design the microstrip filters, it is necessary to measure the complex permittivity for each substrate. The results of BMT substrates measured below 100K are scattered between ε_s=24.0~24.4 and tanδ_s=(1~10)×10^<-6>. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | High-Temperature Superconductive thin films / complex permittivity |
Paper # | SCE99-5 |
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Committee | SCE |
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Conference Date | 1999/4/23(1days) |
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Registration To | Superconductive Electronics (SCE) |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Microwave measurements of Low-Temperature dependences of complex permittivity of MgO and BMT substrates. |
Sub Title (in English) | |
Keyword(1) | High-Temperature Superconductive thin films |
Keyword(2) | complex permittivity |
1st Author's Name | Toru Hashimoto |
1st Author's Affiliation | Faculty of Engineering, Saitama University() |
2nd Author's Name | Satoshi Kamijyou |
2nd Author's Affiliation | Faculty of Engineering, Saitama University |
3rd Author's Name | Hiromitsu Itamoto |
3rd Author's Affiliation | Faculty of Engineering, Saitama University |
4th Author's Name | Yoshio Kobayashi |
4th Author's Affiliation | Faculty of Engineering, Saitama University |
Date | 1999/4/23 |
Paper # | SCE99-5 |
Volume (vol) | vol.99 |
Number (no) | 28 |
Page | pp.pp.- |
#Pages | 6 |
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