Microwave Properties of One-dimensional Photonic Structures Based on Composite Layers Filled with Nanocarbon

Table 2 Electrical conductivity σ _dc, dielectric permittivity \( {\varepsilon}_r^{\prime } \), and dielectric loss tangent tanδ for the epoxy CMs versus carbon fillers content C

C, wt.%	σ _dc (293 К), S/m	f, GHz	\( {\varepsilon}_r^{\prime } \),	tanδ	Ref.
GNP/epoxy ED20
1	1.0 · 10⁻¹¹	27	4.9	0.017	[32, 43]
2	1.7 · 10⁻¹¹		6.1	0.036
5	1. 8 · 10⁻⁹		15	0.060
10	0.12		52	0.175
CNT(II)/epoxy SEDM2
1	1.7 · 10⁻¹⁰	27	4.66	0.177	[43]
2	1.4 · 10⁻¹⁰		7.45	0.235
3	3.8 · 10⁻⁷		8.58	0.260
5	1.3 · 10⁻⁴		13	0.358
10	1.7 · 10⁻¹		22.75	0.730
Epoxy resin L285
–	8.0 · 10⁻¹²	27	2.9	0.003	This work
CNT/L285
2	3.2 · 10⁻⁵	27	6	0.10	This work
		46	5.6	0.24	This work
GNP/L285
5	2.8 · 10⁻⁴	27	8.9	0.06	This work
		46	8.4	0.11	This work
BaM/L285
30	~1 · 10⁻¹⁰	27	3.3^a	0.024^a	This work
		37	3.4^a	0.028^a	This work

^a \( {\varepsilon}_r^{\prime } \) and tanδ were determined at the assumption that \( {\mu}_{\mathrm{r}}^{\prime}\approx 1 \)