ANTENNA Y20706XL4

PERFORMANCES:

No of ele

L (mm)

G (dBi)

F/B (dB)

F/Sh (dBi)

F/Sv (dBi)

Hor (◦)

Ver (◦)

Temp (◦K)

G/T (dB)

Tlos

(K)

7

2645

12.30

21.57

24.12

16.07

44.2

52.6

269.4

-12.02

4.3

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

139.500

146.300

199.5

1.03:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

D4

D5

All elements made of Al tubes Ǿ6 mm

All dimensions given in milimetres

No boom correction included.

Pos

0

140

340

426

746

1298

1999

2645

Length

1024

1024

910

958

952

923

903

883

 

COMPARISON

TYPE OF

ANTENNA

SINGLE ANTENA

FOUR ANTENNAS IN H-STACK

L

(λ)   

GAIN

(dBd)

Z

(ohms)

VSWR

Bandwidth

E

(m)

H

(m)

Ga

(dBd)

Tlos

(K)

Ta

(K)

G/T

(dB)

G4CQM 6

1.00

9.46

56.7

1.83:1

2.60

2.17

15.44

7.9

249.7

-6.38

KF2YN Boxkite 6

1.04

12.47

49.9

1.20:1

3.90

3.00

18.25

4.6

263.1

-3.80

Vine 6 OWL

1.10

9.69

48.3

1.18:1

2.64

2.21

15.67

8.2

238.4

-5.95

G0KSC 6 LFA

1.13

9.69

49.5

1.03:1

2.60

2.19

15.64

4.0

236.9

-5.96

DD0VF 6

1.16

9.73

27.2

1.07:1

2.63

2.22

15.71

5.5

240.1

-5.94

*DD0VF 6

1.16

9.73

27.2

1.07:1

2.30

2.30

15.58

5.5

245.1

-6.16

Y20706XL4

1.27

10.15

199.5

1.03:1

3.18

2.24

16.19

4.3

241.0

-5.48

M2 2M7

1.28

9.94

204.9

1.14:1

2.65

2.26

15.76

3.7

245.0

-5.98

*M2 2M7

1.28

9.94

204.9

1.14:1

2.21

2.03

15.17

3.7

239.9

-6.48

KF2YN Boxkite 7

1.32

13.34

52.7

1.06:1

4.17

3.40

19.30

5.2

245.5

-2.40

G0KSC 7LFA

1.39

10.62

48.0

1.19:1

2.84

2.49

16.53

1.8

248.9

-5.28

DG7YBN 7

1.44

10.59

47.2

1.70:1

2.88

2.47

16.55

4.5

242.7

-5.15

Vine 7 FD

1.45

10.56

47.9

1.14:1

2.83

2.46

16.47

8.2

238.6

-5.16

G4CQM 7

1.50

10.76

50.7

2.31:1

2.89

2.53

16.69

7.9

239.9

-4.96

CT1FFU 7

1.54

10.82

28.0

1.02:1

2.87

2.50

16.70

2.8

237.7

-4.96

DK7ZB 7

1.57

11.11

28.4

1.64:1

3.16

2.84

17.13

5.8

272.6

-5.07

IK0BZY 6

1.63

11.11

19.5

2.27:1

3.10

2.77

17.04

4.8

266.5

-5.07

Z(ohms) - measured on 144.100 MHz

Bandwidth – VSWR measured on 145.000 MHz

 

DIAGRAMS (no loss included)

 

SWR DIAGRAMS (loss included for Al)

STACKING

Horizontal distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

100

 

 

 

100

13.91

234.4

-9.77

110

 

 

 

110

14.08

229.4

-9.50

120

 

 

 

120

14.23

226.9

-9.31

130

13.90

272.8

-10.45

130

14.36

227.0

-9.18

140

14.08

268.5

-10.20

140

14.47

228.7

-9.10

150

14.24

266.1

-10.00

150

14.57

230.7

-9.04

160

14.38

264.8

-9.84

160

14.67

232.4

-8.97

170

14.51

264.5

-9.71

170

14.76

233.5

-8.90

180

14.63

264.8

-9.59

180

14.86

233.3

-8.80

190

14.75

265.5

-9.48

190

14.97

232.2

-8.67

200

14.85

266.5

-9.40

200

15.09

231.7

-8.54

210

14.95

267.7

-9.32

210

15.19

232.8

-8.46

220

15.05

268.8

-9.24

220

15.29

235.8

-8.42

230

15.13

270.0

-9.18

230

15.36

240.8

-8.44

240

15.20

271.0

-9.12

240

15.42

247.1

-8.49

250

15.27

271.9

-9.07

250

15.46

254.4

-8.58

260

15.32

272.6

-9.03

260

 

 

 

270

15.37

273.1

-8.99

270

 

 

 

280

15.41

273.5

-8.95

280

 

 

 

290

15.44

273.7

-8.93

290

 

 

 

300

15.46

273.7

-8.91

300

 

 

 

310

15.48

273.6

-8.89

310

 

 

 

320

15.49

273.4

-8.87

320

 

 

 

330

15.50

273.1

-8.86

330

 

 

 

340

15.50

272.8

-8.85

340

 

 

 

350

15.50

272.4

-8.85

350

 

 

 

360

15.50

272.0

-8.84

360

 

 

 

370

 

 

 

 

 

 

 

380

 

 

 

 

 

 

 

*The Table is presented without KF2YN convergence correction applied and serves only to show which distance can be used

with good result. and which distances should be avoided.

 

BEST DISTANCES FOR 4 ANTENNAS IN H-STACK

Horizontal

distance (cm)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Remark

2765

2348

18.25

247.4

-5.68

Per DL6WU formula

3180

2240

18.34

241.0

-5.48

For max G/T

1680

1240

16.03

223.4

-7.48

For lowest temperature

 

STACKING DIAGRAMS FOR MAX G/T

STACKING DIAGRAMS FOR LOWEST TEMPERATURE