ANTENNA X21410XL9Q

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

14.23

32.27

-

16.87

41.8

33.8

224.4

-9.29

3.0

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

139.200

147.300

8.100

197.4

1.08:1

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

D5

D6

Dimensions given in milimetres

Diameter of elements 10 milimetres

No boom correction included.

 

Pos

0

269

438

812

1252

1722

2408

2945

Length

1012

798

926

917

923

903

895

881

Height

0

230

235

395

525

615

655

655

 

CONSTRUCTION OF RADIATOR

H = 798

V = 230

= 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)

G0KSC 7LFA

1.39

10.62

48.0

1.19:1

2.84

2.49

16.53

1.8

248.9

-5.28

X21410XL9Q

1.39

12.08

197.4

1.08:1

3.86

3.80

18.19

3.0

223.8

-3.16

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

 

 

 

120

 

 

 

130

15.56

217.8

-7.87

130

 

 

 

140

15.73

217.3

-7.69

140

 

 

 

150

15.87

217.6

-7.55

150

 

 

 

160

 

 

 

160

 

 

 

170

 

 

 

170

 

 

 

180

 

 

 

180

15.41

278.0

-9.04

190

 

 

 

190

 

 

 

200

16.42

225.0

-7.14

200

15.98

246.4

-7.96

210

 

 

 

210

 

 

 

220

 

 

 

220

16.26

236.0

-7.50

230

 

 

 

230

16.34

233.9

-7.38

240

 

 

 

240

16.41

231.7

-7.28

250

16.80

229.6

-6.85

250

16.48

229.4

-7.16

260

 

 

 

260

16.55

228.9

-7.08

270

16.92

229.1

-6.72

270

16.61

230.7

-7.06

280

 

 

 

280

16.66

233.6

-7.06

290

 

 

 

290

 

 

 

300

 

 

 

300

 

 

 

310

 

 

 

310

 

 

 

320

 

 

 

320

 

 

 

330

17.13

224.3

-6.42

330

 

 

 

340

17.15

233.5

-6.38

340

 

 

 

350

 

 

 

350

17.10

225.1

-6.46

360

17.17

222.3

-6.34

360

 

 

 

370

17.18

222.0

-6.33

370

17.17

224.4

-6.38

380

17.18

221.9

-6.33

380

17.20

224.9

-6.36

390

17.18

222.0

-6.33

390

17.21

225.7

-6.37

 

 

 

 

400

17.22

226.7

-6.37

*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

2903

3599

20.14

230.9

-3.50

3.0

Per DL6WU formula

3800

3800

20.35

224.4

-3.16

3.0

For max G/T

1460

3800

18.95

215.7

-4.39

3.0

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

23.37

223.1

-0.12

3.0

1460

3800

21.35

216.7

-2.03

3.0

 

 

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)

1460

3720

 

 

 

 

3860

3800

26.41

226.9

+2.85

3.0