ANTENNA X74806XL7Q

 

DESCRIPTION

 

Radiator

Number of  yagi elements

Boomlength (mm)

 

Double rectangle

47 + radiator

5835
       

 

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)

19.88

31.72

19.71

19.43

21.6

18.9

26.8

3.6

+5.60

 

DIMENSIONS

Element

Ref

De

D1, D2

D3,D4

D5,D6

D7,D8

D9,D10

D11,D12

D13,D14

Position

0

128

183

318

475

578

752

1006

1256

Length

332

269

300.5

295.5

293

288.5

288.5

283

280.5

Height

0

±80

±65.5

±106

±145

±166

±190

±216

±233

Element

D15,D16

D17,D18

D19,D20

D21,D22

D23,D24

D25,D26

D27,D28

D29,D30

D31,D32

Position

1517

1779

2044

2318

2592

2884

3168

3476

3780

Length

278.5

272.5

270.5

268.5

268.5

267

264.5

263

259

Height

±250

±263

±278

±288

±292

±298

±306

±310

±310

Element

D33,D34

D35,D36

D37,D38

D39,D40

D41,D42

D43,D44

D45,D46

 

 

Position

4076

4392

4688

4992

5302

5570

5835

 

 

Length

254.5

251.5

251.5

250.5

250.5

250.5

250

 

 

Height

±310

±308

±300

±290

±285

±278

±255

 

 

 

Remark

All elements made of Al rods Ǿ6 mm

All dimensions given in milimetres

No boom correction included.

 

Ref = Reflector

De =  Dipole (radiator)

D  =   Director

 

CONSTRUCTION OF RADIATOR

Material: Aluminum rod Ø= 6 mm

H = 269.0 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

419.000

439.000

201.6

1.02:1
       

 

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

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

X74806XL7Q

8.41

19.88

201.6

1.02:1

2.12

2.66

25.97

3.6

26.8

11.69

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

 

2120

2120

Vertical distance

2660

 

2660

TWO ANTENNAS STACKED VERTICALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

2660

22.94

26.8

3.6

+8.66

 

Two antennas stacked vertically

TWO ANTENNAS STACKED HORIZONTALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

2120

22.91

25.8

3.6

+8.63

 

Two antennas stacked horizontally

FOUR ANTENNAS IN H-STACK

DISTANCE
(mm)

G
(dBi)

TA
(K)

Tloss
(K)

G/T
(dB)

H = 2120

25.97

26.8

3.6

+11.69

V = 2660

 

Four antennas in H-stack