ANTENNA QY20805XL4D3
An antenna for moderate stacking distances
ANTENNA QY20805XL4D3
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 |
2785 |
12.76 |
22.54 |
19.82 |
16.10 |
43.0 |
48.0 |
261.2 |
-11.41 |
4.3 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
141.000 |
146.400 |
5.400 |
199.2 |
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 |
190 |
320 |
414 |
689 |
1051 |
1559 |
2222 |
2785 |
|
|
Length |
1024 |
1024 |
800 |
944 |
934 |
916 |
546 |
532 |
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) |
|
|
QY20805XL4D3 |
1.34 |
10.60 |
199.2 |
1.08:1 |
3.27 |
2.36 |
16.48 |
4.3 |
243.0 |
-5.22 |
|
G0KSC 7LFA |
1.39 |
10.62 |
48.0 |
1.19:1 |
2.84 |
2.49 |
16.53 |
1.8 |
248.9 |
-5.28 |
|
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 |
14.07 |
234.9 |
-9.65 |
|
110 |
13.84 |
273.1 |
-10.41 |
110 |
14.25 |
229.7 |
-9.37 |
|
120 |
14.10 |
263.2 |
-10.10 |
120 |
14.42 |
227.3 |
-9.15 |
|
130 |
14.31 |
258.0 |
-9.80 |
130 |
14.55 |
227.6 |
-9.03 |
|
140 |
14.48 |
254.8 |
-9.58 |
140 |
14.67 |
229.8 |
-8.95 |
|
150 |
14.63 |
253.2 |
-9.40 |
150 |
14.77 |
232.3 |
-8.89 |
|
160 |
14.76 |
252.7 |
-9.26 |
160 |
14.86 |
234.5 |
-8.85 |
|
170 |
14.88 |
253.2 |
-9.15 |
170 |
14.95 |
237.0 |
-8.80 |
|
180 |
14.99 |
254.3 |
-9.06 |
180 |
15.03 |
239.3 |
-8.76 |
|
190 |
15.09 |
255.8 |
-8.98 |
190 |
15.13 |
240.5 |
-8.68 |
|
200 |
15.19 |
257.4 |
-8.91 |
200 |
15.23 |
240.4 |
-8.58 |
|
210 |
15.29 |
259.1 |
-8.84 |
210 |
15.34 |
239.8 |
-8.46 |
|
220 |
15.37 |
260.7 |
-8.79 |
220 |
15.44 |
239.4 |
-8.35 |
|
230 |
15.46 |
262.1 |
-8.72 |
230 |
15.55 |
240.0 |
-8.26 |
|
240 |
15.54 |
263.3 |
-8.66 |
240 |
15.63 |
241.8 |
-8.21 |
|
250 |
15.61 |
264.1 |
-8.60 |
250 |
15.71 |
244.8 |
-8.18 |
|
260 |
15.67 |
264.7 |
-8.55 |
260 |
15.77 |
248.7 |
-8.19 |
|
270 |
15.73 |
265.0 |
-8.50 |
270 |
15.82 |
253.2 |
-8.22 |
|
280 |
15.78 |
265.1 |
-8.45 |
280 |
15.86 |
257.9 |
-8.26 |
|
290 |
15.82 |
264.9 |
-8.41 |
290 |
15.89 |
262.5 |
-8.30 |
|
300 |
15.85 |
264.6 |
-8.37 |
300 |
15.92 |
266.8 |
-8.34 |
|
310 |
15.88 |
264.2 |
-8.33 |
310 |
|
|
|
|
320 |
15.90 |
263.6 |
-8.31 |
320 |
|
|
|
|
330 |
15.92 |
263.0 |
-8.28 |
330 |
|
|
|
|
340 |
15.93 |
262.4 |
-8.26 |
340 |
|
|
|
|
350 |
15.94 |
261.8 |
-8.24 |
350 |
|
|
|
|
360 |
15.94 |
261.3 |
-8.23 |
360 |
|
|
|
|
370 |
15.94 |
260.8 |
-8.22 |
370 |
|
|
|
*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 |
|
2.838 |
2.557 |
18.69 |
251.8 |
-5.32 |
4.3 |
Per DL6WU formula |
|
3.020 |
2.200 |
18.64 |
243.0 |
-5.21 |
4.3 |
For max G/T |
|
3.580 |
1.240 |
17.54 |
225.5 |
-5.99 |
4.3 |
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 |
12.76 |
22.54 |
19.82 |
16.10 |
43.0 |
48.0 |
276.3 |
-12.27 |
4.3 |
|
Vertical |
12.67 |
20.38 |
16.65 |
21.89 |
49.0 |
43.8 |
252.1 |
-11.34 |
4.3 |
Horizontal polarisation patterns
Vertical polarisation patterns
