ANTENNA QY20908XL5D4
ANTENNA QY20908XL5D4
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) |
|
9 |
3765 |
13.60 |
24.20 |
21.32 |
15.95 |
43.2 |
48.4 |
243.6 |
-10.27 |
2.6 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
139.900 |
146.500 |
6.600 |
199.4 |
1.07:1 |
DIMENSIONS:
|
|
Ref |
De1 |
De2 |
D1 |
D2 |
D3 |
DQ1 |
DQ2 |
DQ3 |
DQ4 |
All elements made of Al rods Ǿ8 mm The height of all rectangles is 500 All dimensions given in milimetres |
|
Pos |
0 |
160 |
320 |
413 |
692 |
1072 |
1586 |
2282 |
3076 |
3765 |
|
|
Length |
1024 |
1024 |
832 |
930 |
926 |
906 |
544 |
514 |
506 |
490 |
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) |
|
|
QY20908XL5D4 |
1.81 |
11.41 |
199.4 |
1.07:1 |
3.44 |
2.74 |
17.38 |
2.6 |
240.6 |
-4.28 |
|
K1FO 10 |
1.84 |
11.34 |
29.4 |
1.44:1 |
3.10 |
2.78 |
17.27 |
4.3 |
257.7 |
-4.69 |
|
Vine 8 FD |
1.85 |
11.18 |
51.4 |
1.12:1 |
3.00 |
2.63 |
17.06 |
8.5 |
232.3 |
-4.45 |
|
YU7EF 8 |
1.87 |
11.31 |
48.5 |
1.21:1 |
3.04 |
2.71 |
17.23 |
3.8 |
242.1 |
-4.46 |
|
BQH8B |
1.88 |
11.60 |
50.0 |
1.29:1 |
3.28 |
2.97 |
17.62 |
7.2 |
259.3 |
-4.37 |
|
UR5EAZ 9 |
1.89 |
11.32 |
49.2 |
1.01:1 |
3.07 |
2.75 |
17.26 |
3.6 |
249.7 |
-4.56 |
|
G4CQM 8 |
1.91 |
11.52 |
49.5 |
1.11:1 |
3.15 |
2.83 |
17.45 |
5.1 |
248.5 |
-4.35 |
|
KF2YN Boxkite9 |
1.92 |
13.98 |
49.2 |
1.28:2 |
4.45 |
3.70 |
19.95 |
5.6 |
228.6 |
-1.48 |
|
CT1FFU 8 |
1.94 |
11.28 |
27.1 |
1.05:1 |
2.96 |
2.62 |
17.10 |
2.9 |
232.3 |
-4.41 |
|
G0KSC 8OWL |
1.95 |
11.63 |
48.9 |
1.26:1 |
3.13 |
2.82 |
17.55 |
4.6 |
235.7 |
-4.02 |
|
I0JXX 8 |
2.04 |
12.11 |
200.1 |
3.00:1 |
3.46 |
3.17 |
18.10 |
9.3 |
257.3 |
-3.86 |
|
DG0OPK 9 |
2.07 |
11.45 |
28.4 |
1.11:1 |
2.95 |
2.70 |
17.30 |
5.7 |
230.8 |
-4.18 |
|
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 (loss included for Al)
STACKING
|
Horizontal distance (cm) |
G (dBi) |
TA (K) |
G/T (dB) |
Vertical distance (cm) |
G (dBi) |
TA (K) |
G/T (dB) |
|
100 |
|
|
|
100 |
14.95 |
229.4 |
-8.64 |
|
110 |
14.65 |
255.9 |
-9.43 |
110 |
15.10 |
225.1 |
-8.41 |
|
120 |
14.89 |
246.6 |
-9.03 |
120 |
15.23 |
223.6 |
-8.25 |
|
130 |
15.06 |
242.0 |
-8.78 |
130 |
15.34 |
224.6 |
-8.16 |
|
140 |
15.20 |
239.6 |
-8.59 |
140 |
15.43 |
226.9 |
-8.11 |
|
150 |
15.32 |
238.3 |
-8.45 |
150 |
15.52 |
228.2 |
-8.05 |
|
160 |
15.43 |
238.0 |
-8.33 |
160 |
15.62 |
228.2 |
-7.95 |
|
170 |
15.53 |
238.3 |
-8.24 |
170 |
15.71 |
228.9 |
-7.87 |
|
180 |
15.63 |
239.0 |
-8.15 |
180 |
15.78 |
230.9 |
-7.84 |
|
190 |
15.73 |
239.9 |
-8.07 |
190 |
15.85 |
233.4 |
-7.82 |
|
200 |
15.82 |
241.0 |
-8.00 |
200 |
15.92 |
235.3 |
-7.78 |
|
210 |
15.91 |
242.1 |
-7.93 |
210 |
16.00 |
236.1 |
-7.72 |
|
220 |
16.00 |
243.1 |
-7.86 |
220 |
16.09 |
235.9 |
-7.63 |
|
230 |
16.08 |
244.0 |
-7.79 |
230 |
16.18 |
235.4 |
-7.52 |
|
240 |
16.17 |
244.8 |
-7.72 |
240 |
16.27 |
234.9 |
-7.43 |
|
250 |
16.24 |
245.4 |
-7.66 |
250 |
16.36 |
234.9 |
-7.34 |
|
260 |
16.32 |
245.8 |
-7.58 |
260 |
16.44 |
235.5 |
-7.27 |
|
270 |
16.39 |
246.1 |
-7.52 |
270 |
16.52 |
236.8 |
-7.21 |
|
280 |
16.45 |
246.1 |
-7.46 |
280 |
16.59 |
238.7 |
-7.18 |
|
290 |
16.51 |
246.1 |
-7.40 |
290 |
16.64 |
241.0 |
-7.17 |
|
300 |
16.56 |
246.0 |
-7.35 |
300 |
16.69 |
243.5 |
-7.16 |
|
310 |
16.60 |
245.7 |
-7.30 |
310 |
16.73 |
246.1 |
-7.17 |
|
320 |
16.63 |
245.5 |
-7.27 |
320 |
16.76 |
248.6 |
-7.19 |
|
330 |
16.66 |
245.2 |
-7.23 |
330 |
16.78 |
251.0 |
-7.21 |
|
340 |
16.68 |
244.9 |
-7.21 |
340 |
16.80 |
253.1 |
-7.23 |
|
350 |
16.69 |
244.7 |
-7.19 |
350 |
16.81 |
255.1 |
-7.25 |
|
360 |
16.70 |
244.4 |
-7.18 |
|
|
|
|
|
370 |
16.71 |
244.2 |
-7.17 |
|
|
|
|
|
380 |
16.71 |
244.0 |
-7.16 |
|
|
|
|
|
390 |
16.71 |
243.9 |
-7.16 |
|
|
|
|
|
400 |
16.71 |
243.7 |
-7.16 |
|
|
|
|
*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 |
|
3012 |
2801 |
19.47 |
243.4 |
-4.39 |
2.6 |
Per DL6WU formula |
|
3440 |
2740 |
19.53 |
240.6 |
-4.28 |
2.6 |
For max G/T |
|
3560 |
2320 |
19.21 |
234.3 |
-4.49 |
2.6 |
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 |
13.60 |
24.20 |
21.32 |
15.95 |
43.2 |
48.4 |
243.6 |
-10.27 |
2.6 |
|
Vertical |
13.53 |
19.84 |
15.17 |
23.40 |
44.2 |
40.6 |
242.2 |
-10.34 |
2.6 |
Horizontal polarisation patterns
Vertical polarisation patterns
