ANTENNA Q207E3XL8

7 ELE OBLONG ANTENNA MADE OF ALUMINUM TUBES Ø8 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)

7

3465

13.60

22.96

21.56

16.21

40.2

43.4

245.0

-10.30

3.8

 

WORKING CONDITION:

Frequency for SWR=1.5 (MHz)

Z (Ώ)

at 144.100 MHz

SWR at 145.000 MHz

Lowest

Highest

142.400

146.300

50.0

1.07:1

 

DIMENSIONS:

 

Ref

De1

D1

D2

D3

D4

D5

All elements made of Al tubes Ǿ8 mm

The height of the rectangles is 400 mm

All dimensions given in milimetres

Pos

0

315

571

1156

1911

2752

3465

Length

724

676

648

612

586

578

570

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)

G4CQM 7

1.50

10.76

50.7

2.31:1

2.89

2.53

16.69

7.9

239.9

-4.96

CT1FFU 7

1.54

10.82

28.0

1.02:1

2.87

2.50

16.70

2.8

237.7

-4.96

DK7ZB 7

1.57

11.11

28.4

1.64:1

3.16

2.84

17.13

5.8

272.6

-5.07

IK0BZY 6

1.63

11.11

19.5

2.27:1

3.10

2.77

17.04

4.8

266.5

-5.07

Q207E3XL8

1.66

11.45

50.0

1.07:1

3.70

3.00

17.48

3.8

251.0

-4.37

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

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

 

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

3027

2813

19.47

244.6

3.8

-4.42

Per DL6WU formula

3700

3000

19.63

251.0

3.8

-4.37

For max G/T

2040

1500

17.45

224.4

3.8

-6.06

For lowest temperature

 

Patterns for lowest temperature

 

Patterns for max G/T