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Table 2 Characteristics of RFID emitters

From: Electromagnetic compatibility of implantable neurostimulators to RFID emitters

Emitter

Emitter/ Reader Antenna Dimensions (cm)

Standard Used

Emitter Carrier Frequency (MHz)

Maximum H-field (A m-1) at 2.5 cm a

Maximum E-field (RMS) (V m-1) at 10 cm

1

Rectangular Loop

114 × 66 × 6.3

__

0.125

13.3

__

2

Rectangular Loop

3.5 × 4.5 × 0.5

__

0.125

1.2

__

3

Rectangular Loop

20 × 20 × 2.5

ISO 11785

0.134

269.0

__

4

Rectangular Loop

85 × 50 × 5

__

0.134

68.0

__

5

Rectangular Loop

85 × 50 × 5

ISO 11785

0.134

162.0

__

6

Rectangular Loop

31 × 31 × 2.8

ISO 18000-3 mode 1

13.56

4.6

__

7

Rectangular Loop

20 × 20 × 0.8

ISO 18000-3 mode 1

13.56

4.9

__

8

Rectangular Loop

31 × 31 × 2.8

__

13.56

8.6

__

9

Rectangular Loop

31 × 31 × 2.8

ISO 18000-3 mode 1

13.56

8.7

__

10

Rectangular Loop

31 × 31 × 2.8

ISO 18000-3 mode 1

13.56

8.8

__

11

Handheld

19 × 11 ×7.8

ISO 18000-3 mode 1

13.56

7.8

__

12

Patch

2.3 × 2.5 × 0.1

ISO 1443A, 1443B, 15693, 18000-3

13.56

2.4

__

13

Patch

21 × 32 × 1.2

ISO 18000-3 Mode 2

13.56

18.6

__

14

Patch

15.7 × 5.5 × 3

ISO 18000-7

433

__

0.4

15

Stick length 19.8 × diameter 1.4

__

433

__

___

16

Patch

38 × 36.5 × 1.5

__

433

__

___

17

Patch

31 × 31 × 4.8

ISO 18000-6B

915

__

79.3

18

Patch

48.5 × 31 × 5

ISO 18000-6B

915

__

36.2

19

Patch

21 × 21 × 3.5

ISO 18000-6

915

__

97.3

20

Patch

22.5 × 21 × 5

ISO 18000-6C

915

__

69.8

21

Stick length 10.5 diameter 0.9

__

2450

__

0.02

22

Stick length 11 diameter 0.8

__

2450

__

1.0

  1. a Maximum H-field strength at 2.5 cm for Emitters 1-5 was measured using magnetic probe Model 1709.001, Electric Research and Management. For Emitters 6 - 13, the maximum H-field strength was measured using magnetic probe, Model H3DV7, Speag. For Emitters 14-16 and 21, 22, the maximum E-field was measured using E-field probe, Model SRM-3000, NARDA. Measured electric field of Emitters 15 and 16 was below the sensitivity level of the probe. For Emitters 17-20, the maximum E-field was measured using E-field probe, Model HI-6105, ETS-Lindgren.