ANTENNA X21406XL4Q

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)

14

2945

14.16

38.35

-

16.30

41.8

34.4

225.1

-9.38

4.5

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

140.000

146.600

6.600

199.2

1.08:1

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

D5

D6

Dimensions given in milimetres

Diameter of elements 6 milimetres

No boom correction included.

 

Pos

0

255

438

834

1256

1724

2408

2945

Length

1016

796

939

929

933

915

913

891

Height

0

230

235

395

525

615

655

655

 

CONSTRUCTION OF RADIATOR

H = 796

V = 230

= 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)

G0KSC 7LFA

1.39

10.62

48.0

1.19:1

2.84

2.49

16.53

1.8

248.9

-5.28

X21206XL4Q

1.41

12.01

199.2

1.08:1

3.80

3.80

18.16

4.5

225.6

-3.22

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

 

 

 

110

 

 

 

110

 

 

 

120

15.38

217.7

-8.04

120

 

 

 

130

15.56

216.5

-7.84

130

 

 

 

140

15.72

216.4

-7.68

140

 

 

 

150

15.86

217.0

-7.55

150

 

 

 

160

 

 

 

160

 

 

 

170

 

 

 

170

 

 

 

180

 

 

 

180

 

 

 

190

 

 

 

190

 

 

 

200

16.37

225.7

-7.20

200

15.99

245.9

-7.94

210

 

 

 

210

 

 

 

220

 

 

 

220

16.28

234.5

-7.45

230

 

 

 

230

16.36

232.3

-7.33

240

 

 

 

240

16.42

231.0

-7.25

250

16.76

230.9

-6.91

250

16.48

230.6

-7.18

260

16.82

230.8

-6.85

260

16.55

231.5

-7.13

270

16.88

230.3

-6.78

270

16.60

233.9

-7.12

280

16.93

229.7

-6.72

280

 

 

 

290

16.98

228.8

-6.65

290

 

 

 

300

17.02

227.9

-6.59

300

16.75

237.8

-7.04

310

17.05

226.9

-6.55

310

16.81

235.6

-6.94

320

17.08

225.9

-6.50

320

16.89

232.7

-6.81

330

17.11

225.0

-6.45

330

16.96

229.8

-6.69

340

17.13

234.2

-6.42

340

17.02

227.5

-6.59

350

17.14

223.5

-6.39

350

17.08

226.0

-6.50

360

17.15

222.9

-6.37

360

17.12

225.3

-6.45

370

17.16

222.6

-6.36

370

17.15

225.2

-6.41

380

17.16

222.5

-6.35

380

17.18

225.6

-6.39

 

17.16

222.5

-6.35

390

17.19

226.3

-6.39

*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

2916

3518

20.07

232.7

-3.60

4.5

Per DL6WU formula

3800

3800

20.31

225.6

-3.22

4.5

For max G/T

1400

3700

18.85

214.8

-4.47

4.5

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)

3800

3800

23.33

224.1

-0.17

4.5

 

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)

3800

3800

23.34

230.3

-0.28

4.5

 

 

 

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)

3800

3800

26.36

229.0

+2.77

4.5