4

TK5552

4698A–RFID–04/03

Figure 3. Typical TK Range of Resonance Frequency

Figure 4. Degree of Modulation Measurement

Figure 5. Typical Behaviour of Resonant Frequency, Degree of Modulation and

Quality Factor versus Field Strength (by RF/32, Manchester)

-4

-3

-2

-1

0

1

2

3

4

-30

-20

-10

0

10

20

30

40

50

60

70

80

Temperature (°C)

V2

V1

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0

25

50

75

100

125

H

Quality factor (Q)

Resonant frequency

Degree of modulation (m)

20

125

25

126

30

127

35

124

15

123

10

122

5

121

120

0