ANTENNA QY21308XL7D8

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)

13

7375

15.66

29.34

25.97

18.22

33.0

34.0

218.9

-7.75

3.7

 

WORKING CONDITION:

Frequency for SWR=1,5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

Bandwidth

140.300

146.200

5.900

199.9

1.07:1

 

DIMENSIONS:

 

Ref

De1

De2

D1

D2

D3

DQ1

All elements made of Al rods Ǿ8mm

The height of all rectangles is 500

All dimensions given in milimetres

Pos

0

140

335

425

696

1118

1642

Length

1016

1016

860

941

937

912

551

 

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

 

Pos

2294

3109

3928

4846

5688

6626

7375

Length

529

509

493

479

469

457

450

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)

QY23108XL7D8

3.54

13.51

199.9

1.07:1

4.08

3.82

19.51

3.7

219.2

-1.75

17LQD EKM#1

3.59

13.30

50.0

1.23:1

3.75

3.52

19.21

4.2

242.1

-2.48

17LQD EKM#2

3.59

13.39

50.0

1.25:1

3.75

3.50

19.32

4.5

227.5

-2.1

DL6WU 14

3.61

13.63

51.4

1.28:1

3.94

3.70

19.53

2.6

246.9

-2.24

DJ9BV 3.6

3.61

13.67

53.5

1.30:1

4.00

3.78

19.57

5.4

249.7

-2.25

K1FO 15

3.64

13.76

39.1

1.30:1

3.94

3.71

19.67

4.8

233.0

-1.85

DK7ZB 12

3.83

14.17

26.8

1.46:1

4.21

4.00

20.11

6.9

237.4

-1.49

UA9TC 13RS

3.83

13.95

49.7

1.07:1

3.94

3.70

19.84

5.2

215.6

-1.35

G0KSC 13 LFA

3.84

14.10

48.5

1.14:1

4.07

3.85

20.02

4.4

221.1

-1.28

InnoV 13 LFA

3.86

13.98

48.7

1.20:1

4.02

3.77

19.89

7.0

219.5

-1.37

YU7EF 13

3.92

14.12

47.9

2.55:1

4.05

3.82

20.00

6.0

220.1

-1.28

IK0BZY 12

3.95

14.06

99.2

1.44:1

4.02

3.78

19.93

6.9

222.5

-1.39

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)

 

SWR 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

16.75

220.3

-6.66

110

16.64

234.6

-7.04

110

16.93

216.1

-6.39

120

16.88

228.3

-6.68

120

17.07

214.7

-6.22

130

17.04

225.1

-6.46

130

17.17

215.9

-6.15

140

17.16

223.2

-6.30

140

17.25

218.5

-6.12

150

17.26

222.1

-6.18

150

17.32

219.9

-6.08

160

17.34

221.5

-6.09

160

17.41

219.3

-5.98

170

17.42

221.3

-6.01

170

17.49

218.6

-5.88

180

17.49

221.4

-5.94

180

17.56

218.6

-5.81

190

17.56

221.6

-5.87

190

17.63

219.2

-5.75

200

17.63

221.7

-5.80

200

17.70

219.9

-5.70

210

17.70

221.8

-5.74

210

17.76

220.6

-5.65

220

17.77

221.7

-5.66

220

17.82

221.3

-5.60

230

17.84

221.5

-5.59

230

17.88

221.8

-5.56

240

17.91

221.2

-5.51

240

17.94

222.2

-5.50

250

17.98

220.7

-5.43

250

18.00

222.3

-5.45

260

18.05

220.1

-5.35

260

18.07

222.1

-5.37

270

18.13

219.5

-5.26

270

18.13

221.5

-5.30

280

18.20

218.8

-5.17

280

18.20

220.6

-5.21

290

18.27

218.1

-5.09

290

18.27

219.6

-5.12

300

18.34

217.5

-5.01

300

18.34

218.6

-5.03

310

18.40

216.9

-4.93

310

18.41

217.7

-4.94

320

18.46

216.4

-4.86

320

18.47

217.0

-4.87

330

18.52

216.0

-4.80

330

18.53

216.6

-4.80

340

18.57

215.7

-4.74

340

18.59

216.5

-4.74

350

18.62

215.6

-4.69

350

18.63

216.8

-4.70

360

18.66

215.6

-4.65

360

18.67

217.2

-4.67

370

18.70

215.7

-4.61

370

18.71

217.7

-4.64

380

18.73

215.9

-4.58

380

18.74

218.0

-4.62

390

18.75

216.1

-4.57

390

18.77

218.2

-4.59

400

18.77

216.5

-4.56

400

18.79

218.4

-4.58

410

18.79

216.9

-4.54

410

18.81

218.5

-4.56

420

18.80

217.3

-4.54

420

18.83

218.5

-4.54

430

18.81

217.6

-4.54

430

18.84

218.5

-4.53

440

18.81

217.6

-4.54

440

18.85

218.4

-4.52

450

18.81

217.7

-4.54

450

18.85

218.2

-4.51

 

 

 

 

460

18.86

217.9

-4.50

 

 

 

 

470

18.86

217.5

-4.49

 

 

 

 

480

18.87

217.1

-4.47

 

 

 

 

490

18.87

216.7

-4.46

 

 

 

 

500

18.87

216.4

-4.46

 

 

 

 

510

18.87

216.2

-4.45

*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)

Tloss

(K)

Remark

3663

3558

21.47

216.9

-1.90

3.7

Per DL6WU formula

4090

3820

21.66

219.1

-1.75

3.7

For max G/T

3760

2520

21.49

216.8

-1.87

3.7

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

15.66

29.34

25.97

18.22

33.0

34.0

218.9

-7.75

3.7

Vertical

15.75

25.08

14.76

21.07

33.0

32.2

225.8

-7.79

3.7

 

Horizontal polarisation patterns

 

 

Vertical polarisation patterns