Table 2 Sensitivity calculation for each sample.

From: High-sensitivity dual-band microstrip sensor for oil–water mixture analysis with RBF neural network optimization

Sample (water content %)

Sensitivity (1.2 GHz) [MHz/εᵣ]

Sensitivity (14.92 GHz) [MHz/εᵣ]

Normalized sensitivity

(1.2 GHz)

Normalized sensitivity (14.92 GHz)

0% pure oil

73.5

101.48

1.00

1.00

5% pure oil

74.2

102.3

1.01

1.01

10% pure oil

74.9

103.0

1.02

1.02

15% pure oil

75.6

103.7

1.03

1.02

20% pure oil

76.4

104.5

1.04

1.03

25% pure oil

77.1

105.1

1.05

1.04

30% pure oil

77.8

105.8

1.06

1.05

35% pure oil

78.5

106.4

1.07

1.05

40% pure oil

79.2

107.1

1.08

1.06

45% pure oil

79.9

107.7

1.09

1.06

50% pure oil

80.6

108.3

1.10

1.07

55% pure oil

81.3

108.9

1.11

1.07

60% pure oil

82.0

109.5

1.12

1.08

65% pure oil

82.7

110.1

1.13

1.08

70% pure oil

83.4

110.7

1.14

1.09

75% pure oil

84.1

111.2

1.15

1.09

80% pure oil

84.8

111.8

1.16

1.10

85% pure oil

85.5

112.4

1.17

1.11

90% pure oil

86.2

113.0

1.17

1.11

95% pure oil

86.9

113.6

1.18

1.12

100% pure oil

87.5

114.2

1.19

1.12