ANTENNA QY20808XL7D3
ANTENNA QY20808XL7D3
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 |
2945 |
12.83 |
24.20 |
21.32 |
15.95 |
43.2 |
48.4 |
257.9 |
-11.28 |
2.6 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
139.700 |
146.500 |
6.800 |
200.0 |
1.08:1 |
DIMENSIONS:
|
|
Ref |
De1 |
De2 |
D1 |
D2 |
D3 |
DQ1 |
DQ2 |
DQ3 |
All elements made of Al rods Ǿ8 mm The height of all rectangles is 500 All dimensions given in milimetres |
|
Pos |
0 |
160 |
320 |
424 |
745 |
1102 |
1612 |
2316 |
2945 |
|
|
Length |
1018 |
1028 |
830 |
934 |
914 |
887 |
538 |
518 |
502 |
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) |
|
|
G0KSC 7LFA |
1.39 |
10.62 |
48.0 |
1.19:1 |
2.84 |
2.49 |
16.53 |
1.8 |
248.9 |
-5.28 |
|
QY20808XL7D3 |
1.41 |
10.68 |
200.0 |
1.08:1 |
3.26 |
2.50 |
16.63 |
2.6 |
245.8 |
-5.12 |
|
DG7YBN 7 |
1.44 |
10.59 |
47.2 |
1.70:1 |
2.88 |
2.47 |
16.55 |
4.5 |
242.7 |
-5.15 |
|
Vine 7 FD |
1.45 |
10.56 |
47.9 |
1.14:1 |
2.83 |
2.46 |
16.47 |
8.2 |
238.6 |
-5.16 |
|
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 |
|
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 |
14.35 |
230.3 |
-9.26 |
|
110 |
14.12 |
260.3 |
-10.03 |
110 |
14.50 |
226.0 |
-9.03 |
|
120 |
14.32 |
253.7 |
-9.72 |
120 |
14.63 |
224.4 |
-8.87 |
|
130 |
14.47 |
250.5 |
-9.51 |
130 |
14.73 |
226.0 |
-8.80 |
|
140 |
14.60 |
248.9 |
-9.35 |
140 |
14.81 |
229.9 |
-8.79 |
|
150 |
14.72 |
248.5 |
-9.23 |
150 |
14.88 |
233.7 |
-8.80 |
|
160 |
14.83 |
249.1 |
-9.13 |
160 |
14.95 |
236.1 |
-8.77 |
|
170 |
14.93 |
250.4 |
-9.05 |
170 |
15.03 |
237.7 |
-8.72 |
|
180 |
15.03 |
252.2 |
-8.98 |
180 |
15.11 |
239.1 |
-8.67 |
|
190 |
15.12 |
254.1 |
-8.92 |
190 |
15.20 |
239.9 |
-8.59 |
|
200 |
15.21 |
256.2 |
-9.87 |
200 |
15.30 |
239.8 |
-8.49 |
|
210 |
15.30 |
258.1 |
-8.81 |
210 |
15.40 |
239.2 |
-8.38 |
|
220 |
15.38 |
259.7 |
-8.76 |
220 |
15.51 |
238.7 |
-8.26 |
|
230 |
15.47 |
261.0 |
-8.69 |
230 |
15.61 |
239.0 |
-8.17 |
|
240 |
15.55 |
261.9 |
-8.63 |
240 |
15.70 |
240.6 |
-8.10 |
|
250 |
15.62 |
262.5 |
-8.57 |
250 |
15.78 |
243.1 |
-8.07 |
|
260 |
15.69 |
262.7 |
-8.50 |
260 |
15.85 |
246.6 |
-8.06 |
|
270 |
15.76 |
262.7 |
-8.43 |
270 |
15.91 |
250.7 |
-8.07 |
|
280 |
15.81 |
262.4 |
-8.38 |
280 |
15.96 |
255.1 |
-8.10 |
|
290 |
15.86 |
262.0 |
-8.32 |
290 |
|
|
|
|
300 |
15.90 |
261.4 |
-8.27 |
300 |
|
|
|
|
310 |
15.93 |
260.8 |
-8.23 |
310 |
|
|
|
|
320 |
15.95 |
260.1 |
-8.20 |
320 |
|
|
|
|
330 |
19.57 |
259.4 |
-8.16 |
330 |
|
|
|
|
340 |
15.98 |
258.7 |
-8.14 |
340 |
|
|
|
|
350 |
15.99 |
258.1 |
-8.12 |
350 |
|
|
|
|
360 |
16.00 |
257.6 |
-8.10 |
360 |
|
|
|
|
370 |
16.00 |
257.2 |
-8.10 |
|
|
|
|
|
380 |
16.00 |
256.9 |
-8.09 |
|
|
|
|
|
390 |
15.99 |
256.7 |
-8.10 |
|
|
|
|
|
400 |
15.98 |
256.6 |
-8.11 |
|
|
|
|
*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 |
|
2826 |
2538 |
18.71 |
249.4 |
-5.25 |
2.6 |
Per DL6WU formula |
|
3260 |
2500 |
18.78 |
245.8 |
-5.12 |
2.6 |
For max G/T |
|
3460 |
1240 |
17.68 |
222.8 |
-5.80 |
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 |
12.83 |
24.20 |
21.32 |
15.95 |
43.2 |
48.4 |
257.9 |
-11.28 |
2.6 |
|
Vertical |
11.73 |
21.27 |
15.65 |
22.61 |
49.2 |
43.8 |
249.8 |
-11.25 |
2.3 |
Horizontal polarisation patterns
Vertical polarisation patterns
