ANTENNA X21206XL2Q

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)

12

2305

13.46

32.68

-

16.82

44.5

37.9

232.7

-10.20

4.2

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

142.200

146.400

4.200

198.7

1.16:1

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

D5

Dimensions given in milimetres

Diameter of elements 6 milimetres

No boom correction included.

 

Pos

0

232

402

758

1188

1732

2305

Length

1012

776

918

927

935

923

897

Height

0

240

230

390

520

595

630

 

CONSTRUCTION OF RADIATOR

H = 776

V = 240

= 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)

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

X21206XL2Q

1.11

11.32

198.7

1.16:1

3.70

3.42

17.42

4.2

235.7

-4.15

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

14.57

224.9

-8.99

110

 

 

 

120

14.80

222.3

-8.72

120

 

 

 

130

14.97

221.6

-8.53

130

 

 

 

140

15.12

221.8

-8.39

140

 

 

 

150

15.25

222.7

-8.28

150

 

 

 

160

15.37

224.3

-8.18

160

 

 

 

170

15.48

226.3

-8.11

170

 

 

 

180

15.58

228.8

-8.06

180

15.11

269.2

-9.20

190

15.68

231.3

-8.00

190

15.35

157.6

-8.78

200

15.76

233.8

-7.97

200

15.52

249.3

-8.47

210

15.84

236.0

-7.93

210

15.65

243.5

-8.25

220

15.92

237.8

-7.88

220

15.75

239.5

-8.08

230

15.99

239.0

-7.83

230

15.82

236.8

-7.96

240

16.06

239.8

-7.77

240

15.87

235.7

-7.89

250

16.12

240.1

-7.72

250

15.91

237.4

-7.88

260

16.18

240.0

-7.66

260

15.95

240.4

-7.89

270

16.23

239.6

-7.60

270

16.00

241.7

-7.86

280

16.27

238.9

-7.55

280

16.05

240.7

-7.80

290

16.31

237.9

-7.49

290

16.12

238.3

-7.69

300

16.34

236.9

-7.44

300

16.19

235.7

-7.57

310

16.36

235.7

-7.40

310

16.26

233.8

-7.47

320

16.38

234.5

-7.36

320

16.32

232.9

-7.39

330

16.40

233.4

-7.32

330

16.37

233.0

-7.34

340

16.41

232.3

-7.29

340

16.42

234.0

-7.31

350

16.42

231.3

-7.26

350

16.45

235.6

-7.31

360

16.43

230.5

-7.24

360

16.46

237.5

-7.33

370

16.44

229.9

-7.22

370

 

 

 

380

16.44

229.5

-7.21

380

 

 

 

390

16.44

229.3

-7.21

 

 

 

 

*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

2747

3203

19.33

241.5

-4.50

4.2

Per DL6WU formula

3700

3420

19.57

235.7

-4.15

4.2

For max G/T

1380

3300

18.19

221.2

-5.26

4.2

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

3420

22.59

234.6

-1.11

4.2

1380

3300

20.62

221.6

-2.84

4.2

 

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)

1380

3300

23.66

220.6

+0.22

4.2

3700

3420

25.61

236.0

+1.86

4.2