© TDK Corporation 2018
Product Marketing [Jan 2018] 1
Attracting Tomorrow
ANTENNA DESIGN APPLICATION NOTES
STUDY | PCB DIMENSION (Length)
►MAX EFFICIENCY & BANDWIDTH (SIMULATION RESULTS)
EVALUATION BOARD
■ ANT160920ST-1204A1
Dimensions (mm)
L W T
1.60 0.80 0.40
±0.10 ±0.10 Max.
TUNING COMPONENTS
Antenna Location: PCB End
Board size: L x 20 x 1 mm
2
Antenna keep out area: 20 x 10 mm
2
VSWR & EFFICIENCY (SIMULATION RESULTS)
Lmm
20mm
10 mm
20mm
Ft-1
Feeding
Mt
Ft-2
L(mm) 20 30 40 50 60 70 80 90 100 110 120
MC(nH) 4.3 4.3 4.3 4.3 4.3 4.7 5.1 6.2 7.5 9.1 12
Ft-1(nH) 16 12 11 9.1 7.5 6.8 5.6 4.3 3.3 2 1
Ft-2(nH) 1.2 1.5 0.4 0.9 1.3 0.8 0.9 0.7 0.8 1 1
Frequency(GHz) 0.902 0.916 0.93 0.902 0.916 0.93
L=20 2.1 1.2 2.7 -13.7 -12.9 -13.7
L=30 1.9 1.3 2.9 -10.6 -10.0 -10.9
L=40 1.9 1.2 2.7 -8.8 -8.1 -8.9
L=50 1.8 1.2 2.7 -7.1 -6.5 -7.2
L=60 1.8 1.2 2.5 -5.8 -5.2 -5.9
L=70 1.7 1.2 2.3 -4.7 -4.2 -4.7
L=80 1.5 1.2 2.1 -3.7 -3.3 -3.6
L=90 1.4 1.2 1.9 -2.7 -2.4 -2.6
L=100 1.3 1.2 1.7 -2.0 -1.8 -1.9
L=110 1.2 1.1 1.5 -1.4 -1.2 -1.3
L=120 1.1 1.2 1.4 -0.9 -0.8 -0.9
VSWR
Efficiency(dB)
L=20 L=30 L=40 L=50 L=60 L=70 L=80 L=90 L=100 L=110 L=120
Max Efficiency(dB) -12.9 -10.0 -8.1 -6.4 -5.2 -4.2 -3.3 -2.4 -1.8 -1.2 -0.8
BW@VSWR=2(MHz) 22 23 24 24 25 29 33 41 51 67 93
920MHz band
© TDK Corporation 2018
Product Marketing [Jan 2018] 2
Attracting Tomorrow
ANTENNA DESIGN APPLICATION NOTES
STUDY | PCB DIMENSION (Width)
►VSWR & EFFICIENCY (SIMULATION RESULTS)
EVALUATION BOARD
■ ANT160920ST-1204A1
Dimensions (mm)
L W T
1.60 0.80 0.40
±0.10 ±0.10 Max.
TUNING COMPONENTS
Antenna Location: PCB End
Board size: 50 x B x 1 mm
2
Antenna keep out area: B x 10 mm
2
MAX EFFICIENCY & BANDWIDTH (SIMULATION RESULTS)
10 mm
L(mm) 50
B(mm) 10 12 14 16 18 20
Mt(nH) 6.8 5.6 5.1 4.7 4.3 4.3
Ft-1(nH) 30 24 20 16 12 9.1
Ft-2(nH) 1 1.5 1 1 1.3 0.9
VSWR
Efficiency(dB)
10x10 12x10 14x10 16x10 18x10 20x10
Max Efficiency(dB) -9.4 -8.2 -7.8 -7.3 -6.8 -6.4
BW@VSWR=2(MHz) 34 29 27 26 24 24
920MHz band
50mm
Bmm
10 mm
Ft-1
Feeding
Mt
Ft-2
Bmm