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Outer Dimensions

Outer Dimensions. Weight of Components. Heat Analysis – Hand Calculations. Conduction caused by air: Section of chip 0.1” x 0.1” A=6.45*10 -6 m 2 Q= -KA ( dT / dx ) Q Total =1.6W Q Part =1.6W/210 = 0.00762W K= (about) 0.0257 Wm -1 K -1 dT / dx = Q/(-KA)

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Outer Dimensions

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  1. Outer Dimensions

  2. Weight of Components

  3. Heat Analysis – Hand Calculations • Conduction caused by air: • Section of chip 0.1” x 0.1” • A=6.45*10-6 m2 • Q= -KA (dT/dx) • QTotal=1.6W • QPart =1.6W/210 = 0.00762W • K= (about) 0.0257 Wm-1K-1 • dT/dx = Q/(-KA) • dT/dx = 0.00762/(0.0257*6.45*10-6) = 45969 degC/m =649 degF/in =64.9 degF/0.1in Not conclusive, but a good representation that air acts as an insulator Air Chip

  4. Heat – Experimental Results RFID Reader connected to power in case until it reaches steady state Antenna run on full power for 20 minutes Chip temperature reached about 128 deg F Ambient inside case temp reached about 116 deg F

  5. Heat – Analytical Analysis Case thermal conductivity = 0.2 Wm-1K-1 Outside case temp set to 20 deg F Top of chip set to 130 deg F Bottom of chip insulated

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