ANTENNA QY20706XL7D2

A wide band antenna for small and moderate stacking distances

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

2110

11.59

20.66

25.24

20.70

48.8

58.2

285.9

-12.97

2.6

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

138.900

147.500

8.600

198.9

1.02:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

DQ1

DQ2

All elements made of Al rods Ǿ6 mm

The height of all rectangles is 500

All dimensions given in milimetres

Pos

0

190

320

405

695

1035

1555

2110

Length

1024

1010

930

938

928

902

524

504

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)

G4CQM 6

1.00

9.46

56.7

1.83:1

2.60

2.17

15.44

7.9

249.7

-6.38

QY20706XL7D2

1.01

9.43

198.9

1.02:1

2.85

1.94

15.28

2.6

236.1

-6.30

KF2YN boxkite6

1.04

12.47

49.9

1.20:1

3.90

3.00

18.25

4.6

263.1

-3.80

Vine 6 FD

1.10

9.69

48.3

1.18:1

2.64

2.21

15.67

8.2

238.4

-5.95

G0KSC 6LFA

1.13

9.69

49.3

1.04:1

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

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

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

13.39

235.9

-10.33

110

13.02

281.9

-11.48

110

13.53

232.6

-10.12

120

13.21

277.9

-11.23

120

13.66

231.5

-9.97

130

13.38

275.8

-11.02

130

13.77

232.6

-9.88

140

13.53

275.2

-10.86

140

13.87

234.3

-9.82

150

13.66

275.8

-10.74

150

13.96

234.1

-9.72

160

13.79

277.3

-10.64

160

14.07

232.4

-9.58

170

13.90

279.3

-10.56

170

14.18

231.3

-9.45

180

14.01

281.6

-10.48

180

14.28

232.0

-9.36

190

14.12

283.9

-10.41

190

14.38

234.4

-9.31

200

14.22

286.0

-10.34

200

14.47

238.2

-9.29

210

14.31

287.8

-10.28

210

14.55

243.5

-9.31

220

14.39

289.3

-10.22

220

14.61

250.2

-9.36

230

14.47

290.3

-10.16

230

14.67

258.0

-9.44

240

14.53

291.0

-10.11

240

 

 

 

250

14.59

291.3

-10.05

250

 

 

 

260

14.63

291.3

-10.01

260

 

 

 

270

14.67

291.1

-9.97

270

 

 

 

280

14.70

290.7

-9.93

280

 

 

 

290

14.72

290.1

-9.91

290

 

 

 

300

14.73

289.5

-9.89

300

 

 

 

310

14.74

288.8

-9.87

310

 

 

 

320

14.74

288.1

-9.86

320

 

 

 

330

14.74

287.4

-9.84

330

 

 

 

340

14.74

286.8

-9.83

340

 

 

 

350

14.74

286.2

-9.83

350

 

 

 

360

14.73

285.7

-9.83

360

 

 

 

*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 (cm)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Tloss

(K)

Remark

2528

2139

17.49

250.7

-6.50

2.6

Per DL6WU formula

2750

1940

17.43

236.1

-6.30

2.6

For max G/T

1490

1180

15.37

223.4

-8.12

2.6

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

11.59

20.66

25.24

20.70

48.8

58.2

285.9

-12.97

2.6

Vertical

11.58

20.92

19.35

25.79

58.2

48.8

268.6

-12.71

2.6

 

Horizontal polarisation patterns

 

 

 

Vertical polarisation patterns