Determination of Bolus Dielectric Constant for Optimum Coupling of Microwaves through Skin for Breast Cancer Imaging

Table 1

Coefficients for Cole-Cole models of tissues for 400 MHz–20 GHz.

Tissue	𝜀∞	Δ𝜀1	𝜏1 (ps)	𝛼1	𝜎𝑠 (S/m)
Breast fat	3.145	1.701	14.68	0.05826	0.03605
Wet skin	2.0	48	9.5	0.19	0.710