[Retracted] Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Table 3

Properties of frequently used substrate [12].

Substrate	Coefficient of thermal expansion (x/y/z axis)	Thermal coefficient of relative permittivity (ℇr)
RT6010.21.M	24/24/27 ppm/°C	−425 ppm/°C
RT6006	47/34/117 ppm/°C	−410 ppm/°C
RO4350 B	10/12/32 ppm/°C	+50 ppm/°C
RO4003 C	11/14/46 ppm/°C	+40 ppm/°C
RT5870	22/28/173 ppm/°C	−115 ppm/°C
RT5880	31/48/237 ppm/°C	−125 ppm/°C