Table 6.

Materials specifications.

	Material	Thickness	Characteristics
Substrate	Kapton	0.05 mm	Relative Permittivity: 3.3 Tan (δ): 0.004 @ 2.45 GHz
Conductor	Copper	0.0035 mm	Conductivity: 5.8 × 107 S/m
Protect	Varnish	0.0025 mm	Relative Permittivity: 4.3 Tan(δ): 0.03
Resin	Flexible Silicon	3 mm below circuit 5 mm above circuit	Relative Permittivity: 2.8 Tan(δ): 0.0015 @ 1 MHz