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Table 5 RFID system characteristics

From: Adhoc electromagnetic compatibility testing of non-implantable medical devices and radio frequency identification

RFID reader code Emitter antenna dimensions (cm) Carrier frequency (MHz) Pulse repetition rate (Hz) Duty factor Pulse width (ms) Max field intensity (A/m RMS) @ 2.5 cm Max field intensity (V/m RMS) Governing ISO standard Occurrences of EMI
1 Rectangular Loop 3.5 × 4.5 × 0.5 0.125 CW   -- -- 0
2 Rectangular Loop 114 × 66 × 6.3 0.125 NA 13 -- -- 0
3 Rectangular Loop 85 × 50 × 5 0.134 14.3 0.72 49.9 93 -- 11785 2
4 Rectangular Loop 85 × 50 × 5 0.134 CW 47 -- -- 0
5 Rectangular Loop 20 × 20 × 2.5 0.134 10.6 0.54 50.3 119 -- 11785 4
6 Rectangular Loop 31 × 31 × 2.8 13.56 10.9 0.11 10.3 1 16 18000-3 mode 1 0
7 Rectangular Loop 20 × 20 × 0.8 13.56 4.0 0.13 31.9 1 60 18000-3 mode 1 2
8 Rectangular Loop 31 × 31 × 2.8 13.56 11.1 1.0 90.0 6 67 18000-3 mode 1 3
9 Patch 2.3 × 2.5 × 0.1 13.56 2.6 0.95 362.6 2   18000-3 1
10 Patch 21 × 32 × 1.2 13.56 1.0 0.04 50.5 3 378 18000-3 mode 2 3
11 Handheld 19 × 11 × 7.8 13.56 3.5 0.92 264.0 4 71 18000-3 mode 1 2
12 Stick length 19.8 × diameter 1.4 433 NA -- 0* -- 0
13 Patch 38 × 36.5 × 1.5 433 NA -- 0* -- 0
14 Patch 15.7 × 5.5 × 3 433 NA -- 0* 18000-7 0
15 Patch 31 × 31 × 4.8 915 56.1 k 0.76 0.01 -- 59 18000-6B 7
16 Patch 48.5 × 16 × 5 915 NA -- 33 18000-6B 4
17 Patch 21 × 21 × 3.5 915 NA -- 89 18000-6 8
18 Patch 22.5 × 21 × 5 915 NA -- 73 18000-6C 4
19 Stick length 10.5 diameter 0.9 2450 NA -- 1 -- 0
20 Stick length 11 diameter 0.8 2450 897 0.16 0.18 -- 2 -- 0
  1. This table describes all RFID equipment tested. It describes the carrier frequency, magnetic field strength, electric field strength, the applicable ISO RFID standard, and the number of occurrences of EMI. *RFID Readers 12 and 13 only receive 433 MHz (no transmit capability). RFID #14 is the active tag.