ANTENNA QY20805XL3D2
An antenna for moderate stacking distances
ANTENNA QY20805XL3D2
An antenna for moderate stacking distances
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 |
3385 |
13.27 |
24.11 |
21.32 |
19.22 |
41.0 |
46.2 |
247.7 |
-10.67 |
4.9 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
141.100 |
146.500 |
5.400 |
198.9 |
1.08:1 |
DIMENSIONS:
|
|
Ref |
De1 |
De2 |
D1 |
D2 |
D3 |
DQ1 |
DQ2 |
DQ3 |
All elements made of Al rods Ǿ5 mm The height of all rectangles is 500 All dimensions given in milimetres |
|
Pos |
0 |
225 |
335 |
423 |
734 |
1271 |
1933 |
2746 |
3385 |
|
|
Length |
1016 |
1016 |
890 |
944 |
950 |
930 |
906 |
520 |
510 |
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) |
|
|
QY20805XL3D2 |
1.63 |
11.12 |
198.9 |
1.08:1 |
3.30 |
2.44 |
16.98 |
4.9 |
233.6 |
-4.55 |
|
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 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 |
14.68 |
228.9 |
-8.92 |
|
110 |
14.12 |
267.3 |
-10.16 |
110 |
14.82 |
223.7 |
-8.69 |
|
120 |
14.46 |
259.5 |
-9.69 |
120 |
14.95 |
221.7 |
-8.51 |
|
130 |
14.68 |
253.0 |
-9.36 |
130 |
15.05 |
222.9 |
-8.44 |
|
140 |
14.86 |
248.3 |
-9.10 |
140 |
15.13 |
226.1 |
-8.42 |
|
150 |
15.00 |
245.2 |
-8.90 |
150 |
15.21 |
228.3 |
-8.38 |
|
160 |
15.13 |
243.4 |
-8.74 |
160 |
15.31 |
228.2 |
-8.28 |
|
170 |
15.25 |
242.4 |
-8.60 |
170 |
15.41 |
227.9 |
-8.17 |
|
180 |
15.35 |
242.2 |
-8.50 |
180 |
15.51 |
228.1 |
-8.08 |
|
190 |
15.45 |
242.5 |
-8.40 |
190 |
15.61 |
228.5 |
-7.98 |
|
200 |
15.55 |
243.2 |
-8.31 |
200 |
15.70 |
228.4 |
-7.89 |
|
210 |
15.64 |
244.0 |
-8.24 |
210 |
15.80 |
228.0 |
-7.79 |
|
220 |
15.73 |
245.0 |
-8.16 |
220 |
15.90 |
227.8 |
-7.68 |
|
230 |
15.82 |
245.9 |
08.09 |
230 |
16.00 |
228.1 |
-7.59 |
|
240 |
15.90 |
246.8 |
-8.03 |
240 |
16.09 |
229.4 |
-7.52 |
|
250 |
15.98 |
247.5 |
-7.96 |
250 |
16.17 |
231.8 |
-7.49 |
|
260 |
16.05 |
248.2 |
-7.90 |
260 |
16.23 |
234.9 |
-7.48 |
|
270 |
16.11 |
248.7 |
-7.85 |
270 |
16.29 |
238.7 |
-7.49 |
|
280 |
16.17 |
249.1 |
-7.80 |
280 |
16.34 |
242.9 |
-7.52 |
|
290 |
16.22 |
249.3 |
-7.75 |
290 |
16.37 |
247.1 |
-7.56 |
|
300 |
16.26 |
249.5 |
-7.71 |
300 |
16.40 |
251.2 |
-7.60 |
|
310 |
16.30 |
249.6 |
-7.68 |
310 |
16.43 |
255.0 |
-7.64 |
|
320 |
16.33 |
249.6 |
-7.65 |
320 |
16.44 |
258.5 |
-7.69 |
|
330 |
16.35 |
249.5 |
-7.62 |
330 |
16.45 |
261.6 |
-7.73 |
|
340 |
16.37 |
249.4 |
-7.60 |
340 |
16.45 |
264.4 |
-7.77 |
|
350 |
16.38 |
249.2 |
-7.59 |
350 |
16.44 |
266.8 |
-7.82 |
|
360 |
16.39 |
249.0 |
-7.58 |
|
|
|
|
|
370 |
16.40 |
248.9 |
-7.56 |
|
|
|
|
|
380 |
16.40 |
248.6 |
-7.56 |
|
|
|
|
|
390 |
16.40 |
248.4 |
-7.56 |
|
|
|
|
|
400 |
16.40 |
248.2 |
-7.55 |
|
|
|
|
*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 |
|
2.984 |
2.662 |
19.19 |
242.5 |
-4.65 |
4.9 |
Per DL6WU formula |
|
3.300 |
2.440 |
19.13 |
233.6 |
-4.55 |
4.9 |
For max G/T |
|
3.020 |
1.880 |
18.50 |
224.6 |
-5.01 |
4.9 |
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 |
12.27 |
24.11 |
21.32 |
19.22 |
41.0 |
46.2 |
247.6 |
-12.66 |
4.9 |
|
Vertical |
13.23 |
24.37 |
19.75 |
21.99 |
46.6 |
41.2 |
239.8 |
-10.36 |
4.9 |
Horizontal polarisation patterns
Vertical polarisation patterns
