Skip to main content

Advertisement

Table 2 Summary of the extracted relative permittivities \(\pmb{\epsilon _{\mathrm{r}}}\) and loss tangents tan δ of the tested dielectric materials

From: Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures

T/parameter Micro-Coax LD PTFE Keycom ldPTFE Micro-Coax sPTFE
\(\epsilon_{\mathrm{r}}\)
RT 1.70 ± 0.01 1.72 ± 0.06 1.98 ± 0.07
4K 1.70 ± 0.01 1.72 ± 0.06 2.01 ± 0.07
BT 1.70 ± 0.01 1.72 ± 0.06 2.01 ± 0.07
tanδ [×10−5]
RT 9 ± 1   25 ± 4
4K 8.5 ± 0.2 0.8 ± 0.2 22 ± 2
BT 6.6 ± 0.2 0.7 ± 0.1 19 ± 4
  1. The methods used for the extraction of these parameters are discussed in the text.