ANTENNA X21006XL3Q

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

12.42

24.80

-

17.38

48.8

44.6

252.8

-11.60

3.6

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

141.400

146.700

5.300

197.5

1.06:1

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

Dimensions given in milimetres

Diameter of elements 6 milimetres

No boom correction included.

 

Pos

0

232

399

773

1222

1645

Length

1014

796

921

919

941

909

Height

0

220

225

375

510

540

 

CONSTRUCTION OF RADIATOR

H =796

V = 220

= 6 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)

X21006XL3Q

0.79

10.27

197.5

1.06:1

3.50

2.90

16.32

3.3

250.5

-5.52

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

13.75

235.9

-10.01

110

 

 

 

120

13.94

236.1

-9.82

120

 

 

 

130

14.10

237.2

-9.68

130

 

 

 

140

14.25

238.7

-9.56

140

 

 

 

150

14.38

240.9

-9.46

150

 

 

 

160

14.50

243.5

-9.39

160

 

 

 

170

14.61

246.4

-9.33

170

 

 

 

180

14.71

249.6

-9.28

180

 

 

 

190

14.81

252.7

-9.24

190

 

 

 

200

14.89

255.6

-9.20

200

14.83

243.8

-9.06

210

14.97

258.0

-9.16

210

14.91

245.3

-9.01

220

15.04

259.8

-9.12

220

14.96

247.2

-8.99

230

15.10

261.0

-9.08

230

14.98

148.6

-9.00

240

15.16

261.6

-9.03

240

15.01

248.9

-8.97

250

15.21

261.7

-8.98

250

15.05

247.6

-8.91

260

15.25

261.4

-8.94

260

15.13

245.7

-8.80

270

15.29

260.7

-8.89

270

15.22

244.6

-8.69

280

15.32

259.7

-8.84

280

15.30

245.3

-8.62

290

15.34

258.4

-8.80

290

15.36

248.0

-8.61

300

15.36

257.1

-8.76

300

15.40

252.3

-8.64

310

15.37

255.6

-8.72

310

15.42

257.3

-8.70

320

15.38

254.2

-8.69

320

 

 

 

330

15.39

252.9

-8.66

330

 

 

 

340

15.40

251.7

-8.63

340

 

 

 

350

15.40

250.7

-8.61

350

 

 

 

360

15.40

249.9

-8.60

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.

*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

2528

2741

18.27

253.6

-5.77

3.3

Per DL6WU formula

3500

2900

18.47

250.5

-5.52

3.3

For max G/T

1160

2780

16.89

234.5

-6.86

3.3

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)

3500

2900

21.49

250.4

-2.50

3.3

 

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

21.47

243.2

-2.39

3.3

 

 

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

24.48

244.0

+0.60

3.3