ANTENNA X21008XL3Q
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) |
|
10 |
1645 |
12.57 |
23.17 |
- |
15.82 |
48.2 |
42.5 |
250.6 |
-11.42 |
3.0 |
WORKING CONDITION:
|
Frequency for SWR=1.5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
141.300 |
146.300 |
5.000 |
201.9 |
1.08:1 |
DIMENSIONS:
|
|
Ref |
De |
D1 |
D2 |
D3 |
D4 |
Dimensions given in milimetres Diameter of elements 8 milimetres No boom correction included.
|
|
Pos |
0 |
225 |
389 |
762 |
1226 |
1645 |
|
|
Length |
1012 |
800 |
916 |
915 |
937 |
913 |
|
|
Height |
0 |
±220 |
±230 |
±395 |
±535 |
±575 |
CONSTRUCTION OF RADIATOR
H =800
V = 220
Ø = 8 mm
COMPARISON (inserted in a part of VE7BQH table, where it belongs according to its boom length)
|
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) |
|
|
X21008XL3Q |
0.79 |
10.27 |
201.9 |
1.08:1 |
3.70 |
3.00 |
16.45 |
3.0 |
247.0 |
-5.32 |
|
G4CQM 6 |
1.00 |
9.46 |
56.7 |
1.83:1 |
2.60 |
2.17 |
15.44 |
7.9 |
249.7 |
-6.38 |
|
KF2YN boxkite6 |
1.04 |
12.47 |
49.9 |
1.20:1 |
3.90 |
3.00 |
18.25 |
4.6 |
263.1 |
-3.80 |
|
Vine 6 FD |
1.10 |
9.69 |
48.3 |
1.18:1 |
2.64 |
2.21 |
15.67 |
8.2 |
238.4 |
-5.95 |
|
G0KSC 6LFA |
1.13 |
9.69 |
49.3 |
1.04:1 |
2.60 |
2.19 |
15.64 |
4.0 |
236.9 |
-5.96 |
|
DD0VF 6 |
1.16 |
9.73 |
27.2 |
1.07:1 |
2.63 |
2.22 |
15.71 |
5.5 |
240.1 |
-5.94 |
|
M2 2M7 |
1.28 |
9.94 |
204.9 |
1.14:1 |
2.65 |
2.26 |
15.76 |
3.7 |
245.0 |
-5.98 |
|
Z(ohms) - measured on 144.100 MHz Bandwidth – VSWR measured on 145.000 MHz |
||||||||||
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 |
|
|
|
|
110 |
13.88 |
232.4 |
-9.81 |
110 |
|
|
|
|
120 |
14.09 |
232.5 |
-9.61 |
120 |
|
|
|
|
130 |
14.26 |
233.6 |
-9.46 |
130 |
|
|
|
|
140 |
14.41 |
235.2 |
-9.34 |
140 |
|
|
|
|
150 |
14.54 |
237.5 |
-9.25 |
150 |
|
|
|
|
160 |
14.66 |
240.4 |
-9.18 |
160 |
|
|
|
|
170 |
14.77 |
243.7 |
-9.12 |
170 |
|
|
|
|
180 |
14.86 |
247.2 |
-9.09 |
180 |
|
|
|
|
190 |
14.95 |
250.8 |
-9.06 |
190 |
|
|
|
|
200 |
15.02 |
254.0 |
-9.05 |
200 |
14.89 |
246.4 |
-9.05 |
|
210 |
15.09 |
256.9 |
-9.02 |
210 |
14.97 |
246.4 |
-8.97 |
|
220 |
15.16 |
259.0 |
-8.99 |
220 |
15.02 |
247.2 |
-8.93 |
|
230 |
15.22 |
260.5 |
-8.95 |
230 |
15.05 |
248.4 |
-8.92 |
|
240 |
15.27 |
261.3 |
-8.92 |
240 |
15.07 |
249.4 |
-8.92 |
|
250 |
15.32 |
261.5 |
-8.87 |
250 |
15.10 |
249.3 |
-8.89 |
|
260 |
15.36 |
261.1 |
-8.82 |
260 |
15.17 |
247.4 |
-8.79 |
|
270 |
15.40 |
260.2 |
-8.77 |
270 |
15.27 |
244.9 |
-8.64 |
|
280 |
15.43 |
259.0 |
-8.72 |
280 |
15.37 |
243.5 |
-8.52 |
|
290 |
15.46 |
257.5 |
-8.66 |
290 |
15.45 |
244.3 |
-8.46 |
|
300 |
15.48 |
255.9 |
-8.62 |
300 |
15.51 |
247.0 |
-8.44 |
|
310 |
15.50 |
254.2 |
-8.57 |
310 |
15.55 |
250.8 |
-8.47 |
|
320 |
15.52 |
252.4 |
-8.52 |
320 |
|
|
|
|
330 |
15.53 |
250.8 |
-8.49 |
330 |
|
|
|
|
340 |
15.54 |
249.4 |
-8.45 |
340 |
|
|
|
|
350 |
15.55 |
248.2 |
-8.42 |
350 |
|
|
|
|
360 |
15.55 |
247.2 |
-8.40 |
360 |
|
|
|
|
370 |
15.55 |
246.7 |
-8.39 |
|
|
|
|
*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.
*Yellow coloured – good distances
BEST DISTANCES FOR STACK
Four antennas in H-stack
|
Horizontal distance (mm) |
Vertical distance (mm) |
G (dBi) |
TA (K) |
G/T (dB) |
Tlos (K) |
Remark |
|
2548 |
2870 |
18.41 |
254.3 |
-5.65 |
3.0 |
Per DL6WU formula |
|
3700 |
3000 |
18.60 |
247.0 |
-5.32 |
3.0 |
For max G/T |
|
1180 |
2800 |
17.01 |
234.0 |
-6.68 |
3.0 |
For lowest temperature |
Eight antennas in stack (four in horizontal and two in vertical plane)
|
Horizontal distance (mm) |
Vertical distance (mm) |
G (dBi) |
TA (K) |
G/T (dB) |
Tlos (K) |
|
3700 |
3000 |
21.66 |
245.4 |
-2.24 |
3.0 |
Eight antennas in stack (two in horizontal and four in vertical plane)
|
Horizontal distance (mm) |
Vertical distance (mm) |
G (dBi) |
TA (K) |
G/T (dB) |
Tlos (K) |
|
3500 |
2900 |
21.64 |
239.8 |
-2.16 |
3.0 |
Sixteen antennas (four in horizontal and four antennas in vertical plane)
|
Horizontal distance (mm) |
Vertical distance (mm) |
G (dBi) |
TA (K) |
G/T (dB) |
Tlos (K) |
|
3500 |
2900 |
24.67 |
238.1 |
+0.90 |
3.0 |
