ANTENNA X21605XL2Q

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)

16

3605

14.88

26.62

-

16.88

38.2

30.7

228.5

-8.70

6.0

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

141.600

147.200

5.600

 

 

 

DIMENSIONS:

 

Ref

De

D1

D2

D3

D4

D5

D6

D7

Dimensions given in milimetres

Diameter of elements 5 milimetres

No boom correction included.

 

Pos

0

240

398

768

1204

1684

2336

3032

3605

Length

1014

782

930

931

941

929

917

913

903

Height

0

230

230

390

520

605

685

695

685

 

CONSTRUCTION OF RADIATOR

H = 782

V = 230

= 5 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)

X21605XL2Q

1.73

12.73

199.9

1.05:1

3.80

3.90

18.79

6.0

225.6

-2.59

G0KSC 8LFA

1.79

11.06

50.0

1.24:1

3.15

2.40

16.95

3.6

222.2

-4.37

W1JR 8 MOD

1.80

11.14

50.0

1.14:1

3.07

2.75

16.99

5.3

256.7

-4.95

DJ9BV 1.8

1.80

11.34

77.5

1.34:1

3.16

2.80

17.28

5.5

261.2

-4.74

K1FO 10

1.84

11.34

29.4

1.44:1

3.10

2.78

17.27

4.3

257.7

-4.69

Vine 8 FD

1.85

11.18

51.4

1.12:1

3.00

2.63

17.06

8.5

232.3

-4.45

YU7EF 8

1.87

11.31

48.5

1.21:1

3.04

2.71

17.23

3.8

242.1

-4.46

BQH8B

1.88

11.60

50.0

1.29:1

3.28

2.97

17.62

7.2

259.3

-4.37

UR5EAZ 9

1.89

11.32

49.2

1.01:1

3.07

2.75

17.26

3.6

249.7

-4.56

G4CQM 8

1.91

11.52

49.5

1.11:1

3.15

2.83

17.45

5.1

248.5

-4.35

KF2YN Boxkite9

1.92

13.98

49.2

1.28:2

4.45

3.70

19.95

5.6

228.6

-1.48

CT1FFU 8

1.94

11.28

27.1

1.05:1

2.96

2.62

17.10

2.9

232.3

-4.41

G0KSC 8OWL

1.95

11.63

48.9

1.26:1

3.13

2.82

17.55

4.6

235.7

-4.02

Z(ohms) - measured on 144.100 MHz

Bandwidth VSWR measured on 145.000 MHz

 

DIAGRAMS (no loss included)

 

SWR DIAGRAM (loss included for Al)

SWR DIAGRAM 144 - 146 MHZ

STACKING TABLE

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

16.06

223.9

-7.48

130

 

 

 

140

16.25

223.1

-7.28

140

 

 

 

150

16.40

223.2

-7.13

150

 

 

 

160

 

 

 

160

 

 

 

170

 

 

 

170

 

 

 

180

 

 

 

180

 

 

 

190

 

 

 

190

 

 

 

200

16.95

229.2

-6.69

200

16.00

267.7

-8.29

210

 

 

 

210

 

 

 

220

 

 

 

220

 

 

 

230

 

 

 

230

 

 

 

240

 

 

 

240

 

 

 

250

17.35

232.7

-6.35

250

16.94

233.6

-6.78

260

 

 

 

260

17.02

230.2

-6.62

270

 

 

 

270

17.14

227.9

-6.48

280

 

 

 

280

17.23

227.7

-6.38

290

 

 

 

290

17.29

229.4

-6.35

300

17.66

229.5

-5.99

300

 

 

 

310

 

 

 

310

 

 

 

320

17.75

227.7

-5.86

320

 

 

 

330

17.79

226.9

-5.81

330

 

 

 

340

17.81

226.2

-5.77

340

17.57

232.7

-6.13

350

17.84

225.6

-5.73

350

17.64

228.2

-6.02

360

17.86

225.3

-5.71

360

17.76

226.7

-5.83

370

17.87

225.1

-5.70

370

17.80

226.0

-5.78

380

17.88

225.2

-5.69

380

17.83

226.0

-5.75

390

17.88

225.4

-5.69

390

17.86

226.6

-5.73

400

17.89

225.9

-5.69

400

17.87

227.6

-5.74

*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

3179

3930

20.82

229.3

-2.78

6.0

Per DL6WU formula

3800

3900

20.94

225.6

-2.59

6.0

For max G/T

1480

3800

19.35

222.1

-4.11

6.0

For lowest temperature

 

Four antennas in H-stack, H=3.80+3.80+3.80 V=3.90+3.90+3.9 metres

 

 

 

Four antennas in H-stack, H=1.48+1.48+1.48 V=3.80+3.80+3.8 metres

 

 

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

3900

23.83

225.7

+0.35

6.0

 

 

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)

3800

3900

26.98

226.2

+3.44

6.0

 

SIXTEEN ANTENNAS AT H=3.80+3.80+3.80 AND V=3.90+3.90+3.90 METRES - DIAGRAMS