HA31A Datasheet, PDF (23/24 Pages) Taoglas antenna solutions – 915MHz 2dBi Embedded Helical Monopole Antenna

7.6 Antenna Performance Table
ELECTRICAL
Application Bands
ISM 868MHz
Mounting Direction
HAD.A.31
HAD.B.31
Frequency (MHz)
902
915
928
902
915
928
Efficiency
Ground plane length 160mm
50.92 47.74 35.70 54.59 57.56 56.01
Ground plane length 150mm
52.62 49.34 38.06 57.57 58.93 56.60
Ground plane length 140mm
51.00 47.03 36.57 63.01 60.90 54.24
Ground plane length 130mm
50.09 48.24 39.18 65.03 60.52 51.18
Ground plane length 120mm
48.20 45.61 36.69 63.62 58.40 48.61
Ground plane length 110mm
46.34 44.42 36.39 61.72 55.90 46.48
Ground plane length 100mm
48.16 47.19 39.63 56.23 49.34 39.48
Ground plane length 90mm
47.83 46.16 38.14 53.94 45.51 34.89
Ground plane length 80mm
45.88 46.00 35.12
X
X
X
Ground plane length 70mm
44.96 41.97 29.04
X
X
X
Ground plane length 60mm
41.46 43.03 27.19
X
X
X
Ground plane length 50mm
35.34 36.39 18.52
X
X
X
Average Gain(dBi)
Ground plane length 160mm
-2.93 -3.21 -4.47 -2.62 -2.40 -2.51
Ground plane length 150mm
-2.78 -3.07 -4.19 -2.39 -2.30 -2.47
Ground plane length 140mm
-2.92 -3.28 -4.36 -2.00 -2.15 -2.65
Ground plane length 130mm
-3.02 -3.17 -4.06 -1.86 -2.18 -2.90
Ground plane length 120mm
-3.16 -3.41 -4.35 -1.96 -2.34 -3.13
Ground plane length 110mm
-3.34 -3.52 -4.38 -2.09 -2.53 -3.32
Ground plane length 100mm
-3.17 -3.26 -4.02 -2.49 -3.07 -4.03
Ground plane length 90mm
-3.20 -3.36 -4.18 -2.68 -0.83 -4.57
Ground plane length 80mm
-3.38 -3.37 -4.54
X
X
X
Ground plane length 70mm
-3.47 -3.77 -5.37
X
X
X
Ground plane length 60mm
-3.82 -3.66 -5.65
X
X
X
Ground plane length 50mm
-4.51 -4.39 -7.32
X
X
X
DSP-15-8- SPE-16-8-017/C/WY Page 23 of 24