TABLE 3.

Dielectric loss tangent (tan δ) of microwave transparent.

Material	Temperature (°C)	Frequency (GHz)	Dielectric properties			References
			ε′	ε″	tan δ
Silicon	25	1	4.3	<0.05	<0.0116	Meredith (1998)
Alumina	590	2.54	10.37	0.027	0.0026	Bhattacharya and Basak (2016)
	980	2.54	11.06	0.15	0.01356
	1,340	2.54	11.64	0.74	0.06412
Fused silica	25	5.5	N/A	N/A	<0.0003	Durka et al. (2009)
	1,165	5.5	N/A	N/A	0.01
Glass	25	3	4.82	0.026	0.0054	Durka et al. (2009)

*N/A = not available in the reference.