ANTENNA QY21208XL7D7
ANTENNA QY21208XL7D7
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) |
|
11 |
6455 |
15.23 |
26.07 |
25.54 |
17.40 |
34.6 |
36.0 |
221.4 |
-8.22 |
3.7 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
140.100 |
146.300 |
6.200 |
198.3 |
1.06:1 |
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 |
150 |
335 |
425 |
696 |
1106 |
1619 |
|
|
Length |
1016 |
1024 |
856 |
941 |
937 |
911 |
549 |
|
|
|
DQ2 |
DQ3 |
DQ4 |
DQ5 |
DQ6 |
DQ7 |
|
|
|
Pos |
2278 |
3099 |
3918 |
4826 |
5688 |
6455 |
|
|
|
Length |
526 |
506 |
490 |
478 |
470 |
456 |
|
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) |
|
|
QY21208XL7D7 |
3.10 |
13.08 |
198.3 |
1.06:1 |
3.82 |
3.52 |
19.05 |
3.7 |
221.6 |
-2.25 |
|
MBI ModFT17 |
3.12 |
13.29 |
50.1 |
1.41:1 |
3.85 |
3.60 |
19.27 |
8.2 |
239.5 |
-2.37 |
|
F9FT 17 |
3.14 |
12.87 |
25.8 |
1.32:1 |
3.68 |
3.50 |
18.90 |
5.8 |
236.4 |
-2.69 |
|
CC3219 |
3.17 |
12.77 |
18.3 |
1.49:1 |
4.27 |
3.66 |
18.80 |
5.7 |
307.8 |
-3.93 |
|
CC3219 MOD |
3.17 |
13.25 |
29.0 |
1.06:1 |
3.87 |
3.62 |
19.27 |
5.1 |
245.6 |
-2.48 |
|
BQH 13 |
3.19 |
13.30 |
50.0 |
1.11:1 |
3.85 |
3.60 |
19.28 |
4.3 |
244.9 |
-2.46 |
|
DJ9BV 3.2 |
3.22 |
13.30 |
71.8 |
1.36:1 |
3.85 |
3.58 |
19.29 |
6.5 |
239.5 |
-2.35 |
|
DG7YBN 12 |
3.23 |
13.45 |
46.2 |
1.40:1 |
3.99 |
3.83 |
19.47 |
5.6 |
231.0 |
-2.02 |
|
K1FO 14 |
3.26 |
13.36 |
29.6 |
1.42:1 |
3.80 |
3.56 |
19.29 |
4.7 |
237.8 |
-2.32 |
|
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 |
16.47 |
222.2 |
-7.03 |
|
110 |
16.27 |
239.7 |
-7.51 |
110 |
16.58 |
217.4 |
-6.77 |
|
120 |
16.50 |
232.1 |
-7.14 |
120 |
16.71 |
215.5 |
-6.60 |
|
130 |
16.65 |
228.0 |
-6.91 |
130 |
16.81 |
216.2 |
-6.61 |
|
140 |
16.77 |
225.5 |
-6.74 |
140 |
16.89 |
218.4 |
-6.48 |
|
150 |
16.87 |
223.9 |
-6.61 |
150 |
16.97 |
219.5 |
-6.42 |
|
160 |
16.96 |
223.1 |
-6.50 |
160 |
17.05 |
219.0 |
-6.33 |
|
170 |
17.04 |
222.7 |
-6.42 |
170 |
17.14 |
218.6 |
-6.23 |
|
180 |
17.12 |
222.6 |
-6.33 |
180 |
17.21 |
219.0 |
-6.17 |
|
190 |
17.20 |
222.7 |
-6.26 |
190 |
17.27 |
220.1 |
-6.13 |
|
200 |
17.27 |
222.9 |
-6.19 |
200 |
17.34 |
221.4 |
-6.09 |
|
210 |
17.34 |
223.0 |
-6.12 |
210 |
17.40 |
222.8 |
-6.06 |
|
220 |
17.41 |
223.0 |
-6.05 |
220 |
17.45 |
224.0 |
-6.03 |
|
230 |
17.49 |
222.9 |
-5.97 |
230 |
17.51 |
224.9 |
-5.99 |
|
240 |
17.56 |
222.6 |
-5.89 |
240 |
17.58 |
225.3 |
-5.93 |
|
250 |
17.64 |
222.3 |
-5.81 |
250 |
17.64 |
225.2 |
-5.86 |
|
260 |
17.71 |
221.9 |
-5.73 |
260 |
17.71 |
224.6 |
-5.78 |
|
270 |
17.78 |
221.4 |
-5.65 |
270 |
17.79 |
223.7 |
-5.68 |
|
280 |
17.86 |
221.0 |
-5.56 |
280 |
17.86 |
222.7 |
-5.59 |
|
290 |
17.93 |
220.5 |
-5.48 |
290 |
17.93 |
221.6 |
-5.50 |
|
300 |
18.00 |
220.0 |
-5.40 |
300 |
18.01 |
220.7 |
-5.40 |
|
310 |
18.06 |
219.6 |
-5.33 |
310 |
18.07 |
220.0 |
-5.33 |
|
320 |
18.12 |
219.3 |
-5.27 |
320 |
18.14 |
219.5 |
-5.25 |
|
330 |
18.17 |
219.0 |
-5.21 |
330 |
18.19 |
219.4 |
-5.20 |
|
340 |
18.22 |
218.9 |
-5.16 |
340 |
18.24 |
219.6 |
-5.15 |
|
350 |
18.26 |
218.8 |
-5.12 |
350 |
18.29 |
220.0 |
-5.11 |
|
360 |
18.30 |
218.8 |
-5.08 |
360 |
18.32 |
220.6 |
-5.09 |
|
370 |
18.33 |
219.0 |
-5.05 |
370 |
18.35 |
221.1 |
-5.07 |
|
380 |
18.35 |
219.1 |
-5.03 |
380 |
18.38 |
221.5 |
-5.05 |
|
390 |
18.37 |
219.4 |
-5.02 |
390 |
18.40 |
221.8 |
-5.04 |
|
400 |
18.38 |
219.7 |
-5.01 |
400 |
18.42 |
221.9 |
-5.02 |
|
410 |
18.39 |
220.0 |
-5.01 |
410 |
18.43 |
222.0 |
-5.01 |
|
420 |
18.40 |
220.4 |
-5.01 |
420 |
18.44 |
222.0 |
-5.00 |
|
|
|
|
|
430 |
18.44 |
221.9 |
-5.00 |
|
|
|
|
|
440 |
18.45 |
221.7 |
-4.99 |
|
|
|
|
|
450 |
18.45 |
221.4 |
-4.98 |
*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 |
|
3498 |
3366 |
21.05 |
220.9 |
-2.39 |
3.7 |
Per DL6WU formula |
|
3720 |
3520 |
21.20 |
221.6 |
-2.25 |
3.7 |
For max G/T |
|
3720 |
3220 |
21.06 |
220.4 |
-2.37 |
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 |
15.23 |
26.07 |
25.54 |
17.40 |
34.6 |
36.0 |
221.4 |
-8.22 |
3.7 |
|
Vertical |
15.28 |
21.96 |
14.58 |
21.74 |
35.2 |
33.8 |
227.4 |
-8.28 |
3.5 |
Horizontal polarisation patterns
Vertical polarisation patterns
