ANTENNA X72408XL1Q

 

DESCRIPTION

 

Radiator

Number of  yagi elements

Boomlength (mm)

 

Double rectangle

23 + radiator

2285
       

 

PERFORMANCES (loss included, KF2YN correction applied)

G

(dBi)

F/B

(dB)

F/Sh

(dBi)

F/Sv

(dBi)

Hor lobe

(◦)

Ver lobe

(◦)

Ta

(K)

Tlos

(K)

G/T

(dB)

16.90

34.65

29.05

17.91

30.6

24.8

29.3

2.7

+2.23

 

DIMENSIONS

 

Ref

De

D1, D2

D3,D4

D5,D6

D7,D8

D9,D10

D11,D12

D13,D14

D15,D16

D17,D18

D18,D20

D21,D22

Position

0

124

186

312

471

598

766

1004

1256

1516

1778

2050

2285

Length

330

272

296

291

287

284

281

279.5

277.5

277

274.5

269.5

265.5

Height

0

±80

±67

±112

±150

±183

±203

±233

±255

±268

±272

±268

±250

Remark

All elements made of Al rods Ǿ8 mm

All dimensions given in milimetres

No boom correction included.

 

CONSTRUCTION OF RADIATOR

Material: Aluminum rod Ø= 8 mm

H = 272.0 mm

V = 80 mm

 

 

DIAGRAMS

 

Horizontal and verticall pattern in free space, no loss condition

 

 

WORKING CONDITION

Frequency bandwidth for SWR=1.5 (MHz)

Z (Ώ)

at 432.100 MHz

SWR

at 145.000 MHz

Lowest

Highest

410.000

441.400

198.3

1.05:1
       

 

SWR DIAGRAMS (loss included for Al)

SWR curve for amateur bandwidth 432 – 435 MHz

Frequency bandwidth for SWR = 1.5

 

COMPARISON (inserted in a part of VE7BQH table, where it belongs according to its boom length)

TYPE OF

ANTENNA

SINGLE ANTENA

FOUR ANTENNAS IN H-STACK

L

(λ)   

GAIN

(dBi)

Z

(ohms)

VSWR

Bandwidth

E

(m)

H

(m)

Ga

(dBd)

Tlos

(K)

Ta

(K)

G/T

(dB)

KF2YN Boxkite 10

2.37

16.55

48.7

1.08:1

1.50

1.30

22.46

8.7

38.3

6.64

InnoV 10 LFA

2.43

14.43

50.7

1.13:1

1.12

1.03

20.36

3.7

36.4

4.76

YU7EF EF7010B

2.59

14.64

50.0

1.06:1

1.14

1.05

20.56

5.0

37.0

4.88

YU7EF EF7011B-5

2.87

15.07

49.0

1.56:1

1.20

1.11

21.00

4.7

36.1

5.43

Innov 11 LFA

2.87

15.05

50.4

1.07:1

1.20

1.10

20.98

4.0

33.7

5.70

EAntenna 432LFA11

2.94

15.09

47.9

1.28:1

1.20

1.11

21.02

3.9

34.1

5.69

*KF2YN Polly 12 CR

3.17

15.70

48.3

1.17:1

1.30

1.30

21.74

3.2

32.3

6.65

InnoV 12 LFA

3.29

15.48

50.1

1.07:1

1.24

1.16

21.40

4.0

31.2

6.46

X72408XL1Q

3.29

16.90

198.3

1.05:1

1.42

1.86

22.97

3.3

27.4

8.59

YU7EF EF7012B-5

3.30

15.58

48.6

1.40:1

1.26

1.17

21.50

4.9

33.3

6.27

EAntenna 432LFA12

3.31

15.32

50.1

1.45:1

1.23

1.14

21.24

4.3

33.2

6.03

KF2YN Boxkite 13

3.37

17.38

50.9

1.09:1

1.63

1.50

23.29

9.3

39.4

7.35

Innov 13 LFA

3.72

15.92

50.1

1.15:1

1.31

1.23

21.85

4.5

30.9

6.96

YU7EF EF7013M-6

3.83

16.11

49.4

1.06:1

1.33

1.25

22.01

4.7

32.9

6.84

F9FT 19

4.02

15.96

55.7

1.14:1

1.33

1.26

21.88

6.1

39.1

5.96

DG7YBN Tonna 19 mod

4.02

16.17

44.7

1.15:1

1.35

1.27

22.07

6.1

33.8

6.82

InnoV 14 LFA

4.03

16.46

52.6

1.14:1

1.38

1.32

22.31

4.5

30.0

7.42

DG7YBN 14

4.06

16.38

49.4

1.51:1

1.38

1.31

22.30

3.5

30.7

7.42

Z(ohms) - measured on 432.100 MHz

Bandwidth – VSWR measured on 435.000 MHz

 

STACKING

(ALL DATA GIVEN IN ACCORDANCE WITH KF2YN CORRECTION, LOSS INCLUDED)

RECOMMENDED STACKING DISTANCES

 

Two antennas vertically

(mm)

Two antennas horizontally

(mm)

Four antennas in H-stack

(mm)

Horizontal distance

 

1420

1420

Vertical distance

1840

 

1840

TWO ANTENNAS STACKED VERTICALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

1840

19.98

27.7

2.7

+5.55

 

Two antennas stacked vertically

TWO ANTENNAS STACKED HORIZONTALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

1420

19.90

28.8

2.7

+5.30

 

Two antennas stacked horizontally

FOUR ANTENNAS IN H-STACK

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

H = 1420

22.97

27.4

2.7

+8.59

V = 1860

 

Four antennas in H-stack