ANTENNA Q208C4XL10

8 ELE OBLONG ANTENNA MADE OF ALUMINUM TUBES Ø10 MM

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

4445

14.35

21.18

21.17

16.63

36.8

39.6

238.0

-9.41

2.9

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

142.600

146.000

50.0

1.02:1

 

DIMENSIONS:

 

Ref

De1

D1

D2

D3

D4

D5

D6

All elements made of Al tubes Ǿ10 mm

The height of the rectangles is 300 mm

All dimensions given in milimetres

Pos

0

295

671

1298

2036

2827

3667

4445

Length

817

755

724

685

663

643

625

617

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)

WiMo WX220 XPOL

2.13

11.23

202.0

1.08:1

2.94

2.94

17.44

8.4

300.8

-5.19

Gulf Alpha 9

2.13

11.62

203.3

1.15:1

3.26

2.97

17.64

4.6

266.2

-4.46

Gulf Alpha 9 XPOL

2.13

11.60

203.9

1.15:1

3.12

3.12

17.62

5.0

267.6

-4.50

DJ9BV 2.1

2.13

11.89

44.9

1.30:1

3.33

3.04

17.87

5.8

255.2

-4.05

Q208C4XL10

2.13

12.20

50.0

1.02:1

3.80

3.26

18.05

2.9

243.0

-3.45

OZ5HF 9

2.16

11.52

38.0

1.15:1

3.21

2.92

17.47

3.0

272.6

-4.74

YU7EF 9

2.16

11.84

49.8

1.17:1

3.20

2.89

17.74

5.3

236.6

-3.84

F9FT 11

2.17

11.78

21.5

1.25:1

3.26

2.97

17.75

5.3

251.0

-4.10

CC 13B2

2.17

11.79

21.1

1.37:1

3.33

3.01

17.78

5.9

257.9

-4.18

K1FO 11

2.18

11.97

44.0

1.29:1

3.30

3.00

17.90

4.3

248.0

-3.89

CC 215WB

2.19

11.78

17.4

1.47:1

3.36

3.07

17.78

6.6

266.6

-4.33

Vine 9 FD

2.22

11.93

50.0

1.07:1

3.21

2.91

17.80

9.4

230.0

-3.67

Z(ohms) - measured on 144.100 MHz

                     

 

DIAGRAMS (no loss included)

 

SWR DIAGRAMS (loss included for Al)

 

 

 

BEST DISTANCES FOR 4 ANTENNAS IN H-STACK

Horizontal

distance (cm)

Vertical distance (cm)

G

(dBi)

TA

(K)

Tlos

(K)

G/T

(dB)

Remark

3296

3071

20.26

238.1

2.9

-3.51

Per DL6WU formula

3800

3240

20.40

242.6

2.9

-3.45

For max G/T

2680

1420

16.01

218.2

2.9

-7.38

For lowest temperature

 

Patterns for lowest temperature

 

Patterns for max G/T