ANTENNA QY235501XL3D50

 

DESCRIPTION

Radiator

Number of

yagi elements

Number of

oblong elements

Total number

of elements

Boomlength

(mm)

LFA

5

50

55

5015

 

DIMENSIONS

 

Ref

De1

De2

D1

D2

D3

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

DQ8

DQ9

DQ10

Position

0

35

45

57

88

146

195

254

341

428

525

623

724

825

927

1026

Length

112.0

116.0

980

103.4

103.2

98.8

58.8

57.2

55.0

54.2

52.4

52.2

51.4

50.8

50.2

49.6

 

 

DQ11

DQ12

DQ13

DQ14

DQ15

DQ16

DQ17

DQ18

DQ19

DQ20

DQ21

DQ22

DQ23

DQ24

Position

1130

1231

1333

1433

1535

1635

1735

1836

1935

2035

2133

2234

2334

2435

Length

48.4

47.8

47.4

47.0

46.8

46.6

46.4

46.2

46.2

46.2

46.2

46.0

46.0

46.0

 

 

DQ25

DQ26

DQ27

DQ28

DQ29

DQ30

DQ31

DQ32

DQ33

DQ34

DQ35

DQ36

DQ37

DQ38

Position

2538

2638

2737

2833

2932

3032

3134

3234

3334

3434

3537

3638

3737

3836

Length

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

 

 

DQ39

SQ40

SQ41

DQ42

DQ43

DQ44

DQ45

DQ46

DQ47

DQ48

DQ49

DQ50

 

 

Position

3935

4034

4135

4234

4335

4434

4536

4635

4734

4833

4932

5015

 

 

Length

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

46.0

45.0

45.0

45.0

 

 

 

REMARKS

All elements made of CuAg wires Ǿ1.5 mm

The height of rectangles is 60 mm                                    

All dimensions given in milimetres

 

PERFORMANCES (No loss condition)

G

(dBi)

F/B

(dB)

F/Sh

(dBi)

F/Sv

(dBi)

Hor

(◦)

Ver

(◦)

Temp

(◦K)

G/T

(dB)

22.84

33.88

13.21

13.37

13.8

13.8

212.0

-0.40

 

PERFORMANCES (Loss included for silver)

Aluminum

G

(dBi)

TA

(K)

Tloss

(K)

G/T

(dB)

Bandwidth for SWR=1.5

(MHz)

ΔF 

(MHz)

After NEC/EZNEC

22.84

14.2

 

+12.49

1275.000 – 1312.500

37.500

After KF2YN correction

22.67

21.6

7.7

+9.33

Remark

 

 

 

DIAGRAMS (no loss included)

 

 

   

Horizontal and vertical pattern in free space, no loss condition

 

DIAGRAMS (loss included for silver)

 

SWR diagram for the range from 1275.000 – 1315.000 MHz and 1296 – 1300 MHz

 

 

 

Horizontal and vertical pattern in free space, loss included for silver

 

 

STACKING

(ALL DATA GIVEN IN ACCORDANCE WITH KF2YN CORRECTION, LOSS INCLUDED FOR SILVER)

 

RECOMMENDED STACKING DISTANCES

 

Two antennas vertically

(mm)

Two antennas horizontally

(mm)

Four antennas i H-stack

(mm)

Vertical distance

1080

 

1040

Horizontal distance

 

1080

1080

 

TWO ANTENNAS STACKED VERTICALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

G/T
(dB)

Tloss
(K)

1080

25.62

20.9

+12.42

7.7

 

TWO ANTENNAS STACKED HORIZONTALLY

DISTANCE
(mm)

G
(dBi)

TA
(K)

G/T
(dB)

Tloss
(K)

1120

25.75

20.9

+12.55

7.1

 

FOUR ANTENNAS IN H-STACK

DISTANCE
(mm)

G
(dBi)

TA
(K)

G/T
(dB)

Tloss
(K)

H = 1120

28.75

20.7

+15.58

7.1

V = 1080

 

 

Note: For such long antennas stacked, the propper segmentation number is too big, making calculation impossible in EZNEC with a common dual-core computer. Therefore I use a lower number of segments. The result shuld be very close to what has to be the true value. Just, the antenna gain (maybe for 0.05 to 0.1 dB), and the temperature (for 1.0 to 1.5K) are  a bit higher. Therefore, the G/T factor should be correct.