" Perhitungan Antena HELICAL 2.4 "

Perhitungan antenna helical 2.4

Perhitungan Antenna Helical 2.4 GHz

Oleh : Onno W. Purbo YC1DAV

Frekuensi 2.437 Ghz

Diameter Pipa (Dlambda) 0.042 meter

Diameter Ground Plane 0.130 meter

Slambda 0.035 meter

Panjang Gelombang (Lambda) 0.1231 meter

Clambda 0.1319 meter 1.0718 Lambda (hrs antara 0.75-1.33 Lambda)

G (Ground Plane Diameter) 0.1300 meter 1.0560 Lambda (hrs antara 0.8-1.1 Lambda)

S lambda 0.2653 Clambda (hrs antara 0.2126-0.2867 Clambda)

Lilitan Gain Beam L (m)

dBi (deg)

1 6.64 94.2 0.04

2 9.65 66.6 0.07

3 11.41 54.4 0.11

4 12.66 47.1 0.14

5 13.63 42.1 0.18

6 14.42 38.5 0.21

7 15.09 35.6 0.25

8 15.67 33.3 0.28

9 16.18 31.4 0.32

10 16.64 29.8 0.35

11 17.05 28.4 0.39

12 17.43 27.2 0.42

13 17.78 26.1 0.46

14 18.10 25.2 0.49

15 18.40 24.3 0.53

16 18.68 23.5 0.56

17 18.94 22.8 0.60

18 19.19 22.2 0.63

19 19.43 21.6 0.67

20 19.6521.1 0.70

Matching impedance perlu di buat karena impedansi antenna helical 150 ohm, sedang coax 50 ohm.Matching impedance dibuat dari panel / lempengan metal.