ANTENNA X74205XL4Q

 

DESCRIPTION

 

Radiator

Number of  yagi elements

Boomlength (mm)

 

Double rectangle

41 + radiator

4935
       

 

PERFORMANCES (loss included, KF2YN correction applied)

G

(dBi)

F/B

(dB)

F/Sh

(dBi)

F/Sv

(dBi)

Hor

(◦)

Ver

(◦)

Ta

(K)

Tlos

(K)

G/T

(dB)

19.25

45.79

19.89

18.92

23.8

20.0

27.2

4.2

+4.90

 

DIMENSIONS

Element

Ref

De

D1, D2

D3,D4

D5,D6

D7,D8

D9,D10

D11,D12

Position

0

120

181

320

475

578

752

1006

Length

334

270.5

303.5

299.5

294.5

291.5

290.5

287

Height

0

±80

±66

±112

±148

±173

±195

±225

Element

D13,D14

D15,D16

D17,D18

D19,D20

D21,D22

D23,D24

D25,D26

D27,D28

Position

1256

1517

1779

2044

2318

2592

2884

3168

Length

285

279.5

276.5

271.5

271.5

270.5

269.5

267.5

Height

±245

±265

±275

±285

±295

±305

±305

±315

Element

D29,D30

D31,D32

D33,D34

D35,D36

D37,D38

D39,D40

 

 

Position

3476

3782

4084

4386

4682

4935

 

 

Length

263.5

261.5

259.5

253.5

250

249.5

 

 

Height

±315

±308

±302

±296

±289

±265

 

 

 

Remark

All elements made of Al rods Ǿ5 mm

All dimensions given in milimetres

No boom correction included.

 

Ref = Reflector

De =  Dipole (radiator)

D  =   Director

 

CONSTRUCTION OF RADIATOR

Material: Aluminum rod Ø= 5 mm

H = 270.5 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

412.000

440.000

198.8

1.03:1
       

 

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)

YU7EF EF7019B-5

6.43

17.91

50.5

1.12:1

1.60

1.54

23.72

5.7

32.7

8.59

KF2YN Polly 20 CR

6.50

18.30

48.8

1.21:1

1.90

1.90

24.43

3.8

31.1

9.50

InnoV 19 LFA

6.54

18.18

47.6

1.09:1

1.68

1.63

24.10

5.0

29.2

9.45

Tonna 21 DX

6.61

17.91

58.4

2.32:1

1.67

1.61

23.80

6.7

41.3

7.63

KF2YN Boxkite 22

6.70

19.26

52.1

1.17:1

1.99

1.90

25.14

10.8

40.2

9.11

InnoV 20 LFA

6.99

18.28

50.5

1.09:1

1.73

1.67

24.31

5.0

28.1

9.82

X74205XL4Q

7.11

19.25

198.8

1.03:1

2.08

2.32

25.35

4.2

27.4

10.97

RA3AQ AQ70-21f

7.14

18.54

52.3

1.07:1

1.73

1.67

24.41

6.9

31.0

9.51

+DG7YBN 23

7.55

18.65

48.4

1.56:1

1.76

1.70

24.51

3.8

27.8

10.08

YU7EF EF7021B-5

7.59

18.66

50.2

1.33:1

1.74

1.68

24.50

7.8

32.3

9.41

I0JXX 25JXX70

7.91

18.53

198.6

1.12:1

1.74

1.68

24.41

5.6

32.7

9.26

KF2YN Polly 24 CR

8.15

19.15

51.8

1.14:1

1.90

1.90

25.11

3.7

31.0

10.20

+YU7XL QY72410417

8.35

19.01

199.0

1.23:1

2.00

1.90

24.99

3.4

27.1

10.67

InnoV 23 LFA

8.40

19.16

45.2

1.23:1

1.87

1.82

25.08

5.6

28.2

10.58

DJ9BV BVO70-8.5wl

8.43

19.14

203.9

1.45:1

1.95

1.90

25.13

5.0

37.1

9.44

DJ9BV OPT70-8.5wl

8.44

19.04

186.1

1.56:1

1.80

1.75

24.87

4.9

33.9

9.57

EAntenna 432LFA23

8.44

18.96

47.8

3.99:1

1.90

1.84

24.89

8.1

29.6

10.17

YU7EF EF7023B-5

8.47

18.98

48.6

1.21:1

1.79

1.73

24.78

6.4

30.2

9.99

RA3AQ AQ70-24f

8.52

19.22

52.0

1.13:1

1.87

1.82

24.82

6.1

29.0

10.20

InnoV 24 LFA

8.89

19.32

46.4

1.19:2

1.92

1.87

25.25

5.9

28.0

10.78

YU7EF EF7024B-5

8.90

19.19

50.1

1.60:1

1.84

1.79

25.00

7.6

31.5

10.04

+YU7XL QY72810721

10.01

19.64

198.1

1.29:1

2.22

2.06

25.65

3.4

27.2

11.30

YU7EF EF7027B-5

10.18

19.67

50.3

1.64:1

1.94

1.89

25.47

7.8

32.2

10.39

WiMo 27 (YU7EF)

10.43

19.43

191.8

2.72:1

1.85

1.80

25.08

4.3

27.5

10.70

K1FO 33

10.61

20.03

200.5

1.19:1

2.08

2.04

25.95

6.1

31.8

10.93

RA3AQ AQ70-30f

11.39

20.33

51.6

1.10:1

2.08

2.04

26.15

5.8

28.3

11.61

InnoV 30 LFA

11.64

20.45

49.6

2.38:1

2.27

2.22

26.42

6.7

30.6

11.56

*YU7EF EF7032-5

12.49

19.97

51.3

3.44:1

1.94

1.90

25.59

6.6

29.9

10.84

InnoV 33 LFA

13.03

20.85

50.1

1.17:1

2.32

2.29

26.81

5.3

28.8

12.22

DJ9BV OPT70-13wl

13.29

20.85

183.0

1.44:1

2.35

2.29

26.80

5.2

33.4

11.56

I0JXX 39JXX70

13.53

20.16

194.0

1.19:1

2.00

1.97

25.86

6.3

30.9

10.97

InnoV 34 LFA

13.54

20.89

49.4

3.05:1

2.46

2.43

26.87

7.5

31.6

11.87

InnoV 35 LFA

14.00

20.95

49.1

2.69:1

2.46

2.43

26.93

7.5

31.4

11.96

InnoV 38 LFA

15.41

21.45

49.3

1.87:1

2.30

3.35

27.23

6.9

28.9

12.62

InnoV 40 LFA

16.26

21.67

48.0

2.27:1

2.69

2.66

27.67

7.5

29.4

12.99

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

 

2080

2080

Vertical distance

2320

 

2320

TWO ANTENNAS STACKED VERTICALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

2320

22.29

27.6

4.2

+7.88

 

Two antennas stacked vertically

TWO ANTENNAS STACKED HORIZONTALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

2080

22.31

27.0

4.2

+7.99

 

Two antennas stacked horizontally

FOUR ANTENNAS IN H-STACK

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

H = 2080

25.35

27.4

4.2

+10.97

V = 2320

 

Four antennas in H-stack