ANTENNA Y21005XL4

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

5565

14.60

22.18

24.08

18.12

36.0

39.6

227.2

-8.97

5.8

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

138.500

146.000

198.1

1.03:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

D4

D5

D6

D7

D8

Pos

0

285

392

522

914

1556

2278

3075

3902

4798

5565

Length

1010

1032

856

958

947

926

909

895

877

859

849

All elements made of Al tubes Ǿ5mm  -     All dimensions given in milimetres   -   No boom correction included

 

 

COMPARISON

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)

I0JXX 12

2.68

12.67

26.9

1.31:1

3.58

3.30

18.64

6.9

238.0

-2.97

Y21005XL4

2.72

12.45

198.1

1.03:1

3.78

3.38

18.51

5.8

232.3

-3.00

BQH 12J

2.80

12.80

50.0

1.01:1

3.67

3.40

18.83

4.3

246.2

-2.93

CT1FFU 10C

2.82

13.04

27.2

1.23:1

3.62

3.31

18.93

4.2

222.9

-2.40

M2 12

2.84

12.68

37.0

1.13:1

3.48

3.20

18.54

5.4

232.5

-2.97

KF2YN Boxkite12

2.84

14.90

48.5

1.22:1

6.00

4.40

20.84

5.9

227.4

-0.58

BQH 10

2.86

13.05

22.6

1.47:1

3.69

3.43

19.00

7.0

232.5

-2.51

WB9UWA 12

2.87

12.73

23.9

1.47:1

3.48

3.20

18.61

7.0

223.0

-2.72

DK7ZB 10

2.87

13.00

25.8

1.61:1

3.87

3.60

19.17

6.8

247.5

-2.62

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

15.91

219.1

-7.49

110

 

 

 

110

16.03

216.2

-7.31

120

 

 

 

120

16.14

215.7

-7.19

130

15.95

237.8

-7.81

130

16.22

218.1

-7.16

140

 

 

 

140

 

 

 

150

16.22

232.7

-7.44

150

16.35

224.1

-7.15

160

 

 

 

160

 

 

 

170

16.42

229.8

-7.19

170

16.52

223.3

-6.96

180

 

 

 

180

 

 

 

190

16.60

228.2

-6.98

190

16.69

223.4

-6.79

200

 

 

 

200

 

 

 

210

16.76

227.0

-6.79

210

16.86

224.1

-6.64

220

 

 

 

220

 

 

 

230

16.93

226.1

-6.61

230

17.02

223.3

-6.46

240

 

 

 

240

 

 

 

250

17.09

225.4

-6.43

250

17.20

221.4

-6.24

260

 

 

 

260

17.28

220.7

-6.15

270

17.24

225.0

-6.28

270

17.37

220.3

-6.05

280

17.31

224.9

-6.20

280

17.44

220.5

-5.99

290

17.37

224.9

-6.14

290

17.51

221.1

-5.93

300

17.44

224.9

-6.07

300

17.57

222.0

-5.89

310

17.49

225.0

-6.02

310

17.63

223.3

-5.85

320

17.54

225.1

-5.98

320

17.67

224.9

-5.84

330

17.59

225.2

-5.93

330

17.71

226.6

-5.84

340

17.63

225.4

-5.89

340

17.74

228.5

-5.84

350

17.66

225.6

-5.87

350

17.76

230.4

-5.86

360

17.68

225.8

-5.85

360

 

 

 

370

17.71

226.0

-5.82

 

 

 

 

380

17.72

226.3

-5.82

 

 

 

 

 

17.74

226.5

-5.80

 

 

 

 

 

17.75

226.8

-5.80

 

 

 

 

 

17.74

226.6

-5.80

 

 

 

 

*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.

 

BEST DISTANCES FOR 4 ANTENNAS IN H-STACK

Horizontal

distance (cm)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Remark

3366

3071

20.46

226.8

-3.10

Per DL6WU formula

3780

3380

20.66

232.3

-3.00

For max G/T

3680

1280

19.05

217.0

-4.32

For lowest temperature

 

STACKING DIAGRAMS FOR MAX G/T

 

 

STACKING DIAGRAMS FOR LOWEST TEMPERATURE