ANTENNA Y20805XL2

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)

8

3465

13.12

22.57

24.53

17.09

41.4

47.8

249.0

-10.84

5.4

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

141.200

146.700

200.1

1.08:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

D4

D5

D6

All elements made of Al tubes Ǿ5 mm

All dimensions given in milimetres

No boom correction included

Pos

0

140

340

429

741

1288

1967

2745

3465

Length

1020

1004

680

955

955

928

910

892

872

 

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)

G4CQM 10 UZ2

1.67

10.74

45.1

1.26:1

2.89

2.51

16.68

5.7

235.9

-4.90

DG7YBN 8

1.68

10.94

47.5

1.16:1

2.91

2.56

16.84

3.5

238.8

-4.79

I4GBZ 7

1.69

11.41

48.4

2.27:1

3.18

2.86

17.26

5.7

278.9

-5.04

Y20805XL2

1.75

10.97

200.1

1.08:1

3.32

2.50

16.15

5.4

236.0

-4.67

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

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

14.62

226.4

-8.91

110

 

 

 

110

14.77

222.3

-8.68

120

 

 

 

120

14.90

220.5

-8.52

130

14.65

255.7

-9.42

130

15.01

221.0

-8.42

140

14.81

250.7

-9.17

140

15.11

222.5

-8.35

150

14.95

247.6

-8.98

150

15.21

223.3

-8.26

160

15.08

245.7

-8.81

160

15.31

223.6

-8.17

170

15.19

244.8

-8.69

170

15.40

224.7

-8.10

180

15.30

244.5

-8.57

180

15.49

226.1

-8.04

190

15.41

244.6

-8.46

190

15.58

226.7

-7.96

200

15.51

245.0

-8.37

200

15.68

226.4

-7.85

210

15.60

245.7

-8.29

210

15.78

225.7

-7.74

220

15.70

246.4

-8.21

220

15.88

225.6

-7.64

230

15.79

247.2

-8.13

230

15.97

226.5

-7.56

240

15.87

247.9

-8.06

240

16.06

228.7

-7.52

250

15.94

248.5

-8.00

250

16.13

232.2

-7.51

260

16.01

249.1

-7.94

260

16.19

236.5

-7.53

270

16.07

249.5

-7.89

270

16.24

241.3

-7.57

280

16.13

249.9

-7.84

280

 

 

 

290

16.17

250.1

-7.80

290

 

 

 

300

16.21

250.3

-7.76

300

 

 

 

310

16.24

250.3

-7.74

310

 

 

 

320

16.27

250.4

-7.71

320

 

 

 

330

16.29

250.3

-7.69

330

 

 

 

340

16.30

250.3

-7.67

340

 

 

 

350

16.31

250.2

-7.66

350

 

 

 

360

16.32

250.1

-7.65

360

 

 

 

370

16.32

249.9

-7.65

 

 

 

 

380

16.32

249.8

-7.65

 

 

 

 

*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.

 

BEST DISTANCES FOR 4 ANTENNAS IN H-STACK

Horizontal

distance (cm)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Remark

2943

2568

19.03

239.0

-4.76

Per DL6WU formula

3320

2500

19.06

236.0

-4.67

For max G/T

3320

1340

17.97

221.8

-5.49

For lowest temperature

 

STACKING DIAGRAMS FOR MAX G/T

STACKING DIAGRAMS FOR LOWEST TEMPERATURE