ANTENNA QY21805XL9D11

PERFORMANCES:

No of ele

L (mm)

G (dBi)

F/B (dB)

F/Sh (dB)

F/Sv (dB)

Hor

(◦)

Ver

(◦)

Temp (◦K)

G/T

(dB)

Tlos

(K)

18

12405

17.57

30.05

20.18

16.92

26.2

27.0

218.3

-5.83

7.2

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

140.700

146.500

5.800

197.7

1.07:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

D4

D5

DQ1

DQ2

Pos

0

205

355

429

735

1291

1956

2732

3566

4388

Length

1020

1012

840

945

953

933

917

900

520

506

 

DQ3

DQ4

DQ5

DQ6

DQ7

DQ8

DQ9

DQ10

DQ111

 

Pos

5284

6156

7078

7961

8896

9808

10706

11644

12405

 

Length

496

488

482

476

470

462

452

446

438

 

All elements made of Al rods Ǿ5 mm

The height of all rectangles is 500 mm

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)

QY21805XL9D11

5.96

15.42

197.7

1.07:1

5.22

5.48

21.53

7.2

212.4

+0.40

BVO-6WL

6.00

15.65

44.9

1.14:1

4.85

4.85

21.59

7.1

226.7

+0.19

G0KSC 18 LFA

6.12

15.69

47.9

1.33:1

4.77

4.60

21.56

5.3

210.5

+0.48

InnoV 18 LFA

6.14

15.66

48.7

1.35:1

4.73

4.56

21.52

7.7

211.0

+0.43

AF9Y 22

6.14

15.73

49.9

2.65:1

5.01

4.85

21.66

13.1

221.4

+0.36

RA3AQ 18

6.28

16.09

54.9

1.13:1

5.30

5.30

22.12

8.1

222.3

+0.80

MBI 6.6

6.58

16.15

49.1

1.77:1

5.41

5.41

22.17

11.5

228.2

+0.74

DK7ZB 19

6.59

16.15

27.7

1.97:1

5.41

5.22

22.15

8.2

230.2

+0.68

Z(ohms) - measured on 144.100 MHz

Bandwidth – VSWR measured on 145.000 MHz

Data taken from VE7BQH G/T table

 

DIAGRAMS (no loss included)

 

DIAGRAMS (losses included)

 

STACKING

Horizontal distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

Vertical distance (cm)

G

(dBi)

TA

(K)

G/T

(dB)

100

 

 

 

100

18.16

215.7

-5.16

110

17.72

239.6

-6.06

110

18.45

212.7

-4.81

120

18.21

228.6

-5.36

120

18.64

212.2

-4.61

130

18.52

223.4

-4.95

130

18.77

-213.9

-4.51

140

18.73

221.5

-4.71

140

18.86

217.0

-4.48

150

18.87

220.8

-4.55

150

18.93

219.0

-4.46

160

18.98

220.8

-4.44

160

19.00

219.0

-4.38

170

19.07

221.1

-4.36

170

19.08

217.9

-4.28

180

19.15

221.4

-4.28

180

19.16

216.8

-4.18

190

19.21

221.9

-4.23

190

19.24

215.9

-4.08

200

19.28

222.3

-4.17

200

19.31

215.4

-4.00

210

19.34

222.6

-4.12

210

19.38

215.3

-3.93

220

19.39

222.8

-4.07

220

19.44

215.4

-3.87

230

19.45

222.9

-4.01

230

19.50

215.7

-3.82

240

19.51

222.9

-3.95

240

19.56

216.3

-3.77

250

19.56

222.8

-3.90

250

19.62

216.9

-3.72

260

19.62

222.5

-3.84

260

19.67

217.7

-3.69

270

19.67

222.1

-3.78

270

19.73

218.5

-3.65

280

19.73

221.6

-3.71

280

19.78

219.2

-3.61

290

19.78

220.9

-3.64

290

19.83

219.8

-3.57

300

19.84

220.2

-3.57

300

19.88

220.2

-3.53

310

19.90

219.5

-3.49

310

19.93

220.4

-3.48

320

19.95

218.7

-3.43

320

19.98

220.4

-3.43

330

20.01

218.0

-3.35

330

20.04

220.3

-3.37

340

20.07

217.3

-3.28

340

20.09

220.3

-3.32

350

20.12

216.7

-3.22

350

20.14

220.3

-3.27

360

20.18

216.2

-3.15

360

20.19

220.3

-3.22

370

20.23

215.8

-3.09

370

20.24

220.2

-3.17

380

20.28

215.5

-3.03

380

20.29

220.0

-3.12

390

20.33

215.3

-2.98

390

20.34

219.6

-3.06

400

20.38

215.1

-2.93

400

20.38

219.1

-3.01

410

20.43

215.0

-2.87

410

20.43

218.5

-2.95

420

20.47

214.9

-2.83

420

20.48

217.9

-2.88

430

20.51

214.9

-2.79

430

20.52

217.2

-2.83

440

20.55

214.9

-2.75

440

20.56

216.5

-2.78

450

20.58

214.9

-2.72

450

20.60

215.9

-2.72

460

20.62

214.8

-2.68

460

20.63

215.2

-2.68

470

20.64

214.8

-2.66

470

20.67

214.5

-2.62

480

20.67

214.7

-2.63

480

20.70

213.9

-2.75

490

20.69

214.6

-2.61

490

20.72

213.3

-2.55

500

20.71

214.6

-2.59

500

20.74

212.8

-2.52

510

20.73

214.5

-2.56

510

20.76

212.3

-2.49

520

20.75

214.5

-2.54

520

20.78

212.0

-2.46

530

20.76

214.5

-2.53

530

20.79

211.7

-2.45

540

20.77

214.5

-2.52

540

20.80

211.5

-2.43

550

20.78

214.6

-2.52

550

20.81

211.5

-2.42

560

20.79

214.7

   -2.51

560

20.82

211.7

-2.42

570

20.79

214.9

   -2.51

570

20.82

212.0

-2.42

580

20.80

215.1

   -2.51

580

20.82

212.4

-2.43

*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 (mm)

Vertical distance (mm)

G

(dBi)

TA

(K)

G/T

(dB)

Tloss

(K)

Remark

4.590

4.456

23.37

216.7

+0.01

7.2

Per DL6WU formula

5.220

5.480

23.68

212.4

+0.40

7.2

For max G/T

5.220

5.480

23.68

212.4

+0.40

7.2

For lowest temperature

 

 

XPOL VERSION

Horizontal components: Same as above

Vertical components: Same as above, except:

 

PERFORMANCES:

Polarization

G (dBi)

F/B (dB)

F/Sh (dBi)

F/Sv (dBi)

Hor (◦)

Ver (◦)

Temp (◦K)

G/T (dB)

Tlos

(K)

Horizontal

17.57

30.05

20.18

16.92

26.2

27.0

218.3

-5.83

7.2

Vertical

17.77

26.27

14.62

17.61

25.8

25.2

220.4

-5.66

7.2

 

Horizontal polarisation patterns

 

DIAGRAMS (losses included)

 

Vertical polarisation patterns