ANTENNA X21010XL6Q

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)

10

1645

12.66

23.18

-

15.51

48.2

41.4

249.8

-11.32

2.7

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

141.600

146.500

4.900

202.0

1.08:1

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

Dimensions given in milimetres

Diameter of elements 10 milimetres

No boom correction included.

 

Pos

0

216

388

764

1236

1645

Length

1010

792

910

912

932

909

Height

0

220

240

415

545

595

 

CONSTRUCTION OF RADIATOR

H =792

V = 220

= 10 mm

 

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

(dBd)

Z

(ohms)

VSWR

Bandwidth

E

(m)

H

(m)

Ga

(dBd)

Tlos

(K)

Ta

(K)

G/T

(dB)

X21010XL6Q

0.79

10.27

202.0

1.08:1

3.70

3.00

16.53

2.7

246.1

-5.23

G4CQM 6

1.00

9.46

56.7

1.83:1

2.60

2.17

15.44

7.9

249.7

-6.38

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

M2 2M7

1.28

9.94

204.9

1.14:1

2.65

2.26

15.76

3.7

245.0

-5.98

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

 

 

 

110

13.93

230.8

-9.74

110

 

 

 

120

14.16

230.4

-9.50

120

 

 

 

130

14.34

231.4

-9.34

130

 

 

 

140

14.49

233.1

-9.22

140

 

 

 

150

14.62

235.5

-9.13

150

 

 

 

160

14.74

238.4

-9.06

160

 

 

 

170

14.85

241.9

-9.02

170

 

 

 

180

14.93

245.2

-8.99

180

 

 

 

190

15.02

249.5

-8.97

190

 

 

 

200

15.09

253.1

-8.96

200

14.90

244.7

-9.06

210

15.16

256.2

-8.95

210

14.99

246.7

-8.96

220

15.22

258.6

-8.92

220

15.06

246.0

-8.89

230

15.28

260.3

-8.89

230

15.10

247.5

-8.86

240

15.33

261.2

-8.86

240

15.12

248.3

-8.85

250

15.37

261.5

-8.82

250

15.15

248.4

-8.83

260

15.42

261.1

-8.76

260

15.21

246.9

-8.74

270

15.45

260.2

-8.72

270

15.31

244.7

-8.60

280

15.49

258.9

-8.66

280

15.40

243.3

-8.49

290

15.51

257.3

-8.61

290

15.48

243.8

-8.42

300

15.54

255.6

-8.55

300

15.55

246.0

-8.38

310

15.56

253.7

-8.50

310

15.59

249.2

-8.40

320

15.58

251.9

-8.45

320

 

 

 

330

15.59

250.1

-8.41

330

 

 

 

340

15.61

248.6

-8.37

340

 

 

 

350

15.61

247.2

-8.35

350

 

 

 

360

15.62

246.2

-8.32

360

 

 

 

370

15.62

245.5

-8.31

 

 

 

 

*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.

*Yellow coloured good distances

 

 

BEST DISTANCES FOR STACK

 

Four antennas in H-stack

Horizontal

distance (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tlos

(K)

Remark

2548

2943

18.48

255.8

-5.60

2.7

Per DL6WU formula

3700

3000

18.68

246.1

-5.23

2.7

For max G/T

1220

2800

17.11

233.1

-6.56

2.7

For lowest temperature

 

Eight antennas in stack (four in horizontal and two in vertical plane)

Horizontal

distance (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tlos

(K)

3700

3000

21.71

244.4

-2.17

2.7

 

 

Eight antennas in stack (two in horizontal and four in vertical plane)

Horizontal

distance (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tlos

(K)

3500

2900

21.68

238.7

-2.10

2.7

 

 

Sixteen antennas (four in horizontal and four antennas in vertical plane)

Horizontal

distance (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tlos

(K)

3500

2900

24.69

240.4

+1.88

2.7