ANTENNA QY20905XL3D4

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)

9

3795

13.53

21.16

24.35

16.90

40.8

44.2

241.8

-10.31

4.3

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

139.200

146.200

6.600

197.5

1.08:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

DQ1

DQ2

DQ3

DQ4

All elements made of Al rods Ǿ5 mm

The height of all rectangles is 500 mm

All dimensions given in milimetres

Pos

0

180

335

416

703

1076

1584

2254

3069

3795

Length

1020

1030

864

948

936

918

544

522

498

490

No boom correction included.

 

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)

QY20905XL3D4

1.82

11.38

197.7

1.08:1

3.38

2.73

17.31

4.3

239.8

-4.34

K1FO 10

1.84

11.34

29.4

1.44:1

3.10

2.78

17.27

4.3

257.7

-4.69

Vine 8 FD

1.85

11.18

51.4

1.12:1

3.00

2.63

17.06

8.5

232.3

-4.45

YU7EF 8

1.87

11.31

48.5

1.21:1

3.04

2.71

17.23

3.8

242.1

-4.46

BQH8B

1.88

11.60

50.0

1.29:1

3.28

2.97

17.62

7.2

259.3

-4.37

UR5EAZ 9

1.89

11.32

49.2

1.01:1

3.07

2.75

17.26

3.6

249.7

-4.56

G4CQM 8

1.91

11.52

49.5

1.11:1

3.15

2.83

17.45

5.1

248.5

-4.35

KF2YN Boxkite9

1.92

13.98

49.2

1.28:2

4.45

3.70

19.95

5.6

228.6

-1.48

CT1FFU 8

1.94

11.28

27.1

1.05:1

2.96

2.62

17.10

2.9

232.3

-4.41

G0KSC 8OWL

1.95

11.63

48.9

1.26:1

3.13

2.82

17.55

4.6

235.7

-4.02

I0JXX 8

2.04

12.11

200.1

3.00:1

3.46

3.17

18.10

9.3

257.3

-3.86

DG0OPK 9

2.07

11.45

28.4

1.11:1

3.04

2.72

17.34

5.7

231.9

-4.16

DK7ZB 8

2.09

12.01

28.0

1.26:1

3.40

3.10

18.02

4.8

253.6

-3.87

Z(ohms) - measured on 144.100 MHz

Bandwidth – VSWR measured on 145.000 MHz

Data taken from VE7BQH G/T table

 

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

14.88

225.4

-8.66

110

14.75

250.3

-9.22

110

15.04

220.7

-8.41

120

14.94

244.4

-8.93

120

15.17

219.0

-8.24

130

15.10

240.7

-8.70

130

15.27

220.9

-8.18

140

15.23

238.4

-8.53

140

15.35

225.2

-8.18

150

15.34

237.2

-8.40

150

15.42

228.9

-8.18

160

15.45

236.9

-8.28

160

15.50

230.3

-8.12

170

15.55

237.1

-8.19

170

15.59

231.0

-8.05

180

15.65

237.8

-8.10

180

15.67

232.2

-7.99

190

15.74

238.8

-8.03

190

15.75

233.7

-7.94

200

15.83

239.8

-7.96

200

15.83

234.5

-7.87

210

15.92

240.2

-7.89

210

15.91

234.5

-7.79

220

16.01

241.9

-7.82

220

16.00

233.9

-7.69

230

16.10

242.8

-7.74

230

16.10

233.2

-7.58

240

16.18

243.5

-7.67

240

16.19

232.7

-7.48

250

16.26

244.0

-7.60

250

16.28

232.7

-7.39

260

16.34

244.4

-7.53

260

16.36

233.6

-7.33

270

16.41

244.5

-7.46

270

16.44

235.1

-7.27

280

16.47

244.6

-7.40

280

16.50

237.2

-7.25

290

16.52

244.5

-7.35

290

16.56

239.6

-7.24

300

16.57

244.3

-7.30

300

16.60

242.2

-7.24

310

16.61

244.0

-7.25

310

16.64

244.8

-7.25

320

16.64

243.7

-7.22

320

16.67

247.3

-7.26

330

16.66

243.4

-7.19

330

16.69

249.7

-7.29

340

15.68

243.1

-7.17

340

16.70

251.9

-7.31

350

16.70

242.8

-7.14

350

16.71

253.8

-7.34

360

16.71

242.5

-7.13

 

 

 

 

370

16.71

242.2

-7.12

 

 

 

 

380

16.71

242.0

-7.12

 

 

 

 

390

16.71

241.8

-7.11

 

 

 

 

400

16.71

241.6

-7.11

 

 

 

 

*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. In H-stack it can be slightly changed.

 

BEST DISTANCES FOR 4 ANTENNAS IN H-STACK

Horizontal

distance (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tloss

(K)

Remark

2.984

2.984

19.39

242.0

-4.45

4.3

Per DL6WU formula

3.300

3.880

19.46

239.8

-4.34

4.3

For max G/T

3.380

1.720

18.60

229.1

-5.00

4.3

For lowest temperature

 

 

XPOL VERSION

Horizontal components: Same as above.

Vertical components: Same as above, except:

PERFORMANCES:

Polarization

G (dBi)

F/B (dB)

F/Sh (dBi)

F/Sv (dBi)

Hor (◦)

Ver (◦)

Temp (◦K)

G/T (dB)

Tlos

(K)

Horizontal

13.53

21.16

24.35

16.90

40.8

44.2

241.8

-10.31

4.3

Vertical

13.45

17.92

15.42

24.58

44.4

41.0

241.7

-10.39

4.3

 

Horizontal polarisation patterns

 

Vertical polarisation patterns