ANTENNA X21208XL5Q
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) |
|
12 |
2305 |
13.50 |
40.36 |
-- |
16.96 |
44.5 |
37.7 |
233.1 |
-10.18 |
3.3 |
WORKING CONDITION:
|
Frequency for SWR=1.5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
141.200 |
146.400 |
5.200 |
200.0 |
1.09:1 |
DIMENSIONS:
|
|
Ref |
De |
D1 |
D2 |
D3 |
D4 |
D5 |
Dimensions given in milimetres Diameter of elements 8 milimetres No boom correction included.
|
|
Pos |
0 |
240 |
402 |
758 |
1197 |
1753 |
2305 |
|
|
Length |
1012 |
776 |
918 |
927 |
935 |
923 |
897 |
|
|
Height |
0 |
±240 |
±230 |
±390 |
±525 |
±595 |
635 |
CONSTRUCTION OF RADIATOR
H = 790
V = 240
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) |
|
|
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 |
|
X21208XL5Q |
1.11 |
11.32 |
200.0 |
1.09:1 |
3.80 |
3.42 |
17.45 |
3.3 |
234.1 |
-4.08 |
|
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 |
|
|
|
110 |
|
|
|
|
120 |
|
|
|
120 |
|
|
|
|
130 |
14.98 |
221.6 |
-8.52 |
130 |
|
|
|
|
140 |
15.14 |
221.6 |
-8.36 |
140 |
|
|
|
|
150 |
15.28 |
222.4 |
-8.24 |
150 |
|
|
|
|
160 |
15.41 |
223.9 |
-8.14 |
160 |
|
|
|
|
170 |
15.52 |
226.0 |
-8.06 |
170 |
|
|
|
|
180 |
15.62 |
228.6 |
-8.01 |
180 |
15.09 |
268.9 |
-9.22 |
|
190 |
15.71 |
231.3 |
-7.97 |
190 |
|
|
|
|
200 |
15.79 |
234.0 |
-7.94 |
200 |
15.52 |
248.5 |
-8.46 |
|
210 |
|
|
|
210 |
|
|
|
|
220 |
|
|
|
220 |
15.74 |
239.3 |
-8.08 |
|
230 |
|
|
|
230 |
15.81 |
236.7 |
-7.97 |
|
240 |
|
|
|
240 |
15.86 |
235.5 |
-7.90 |
|
250 |
16.14 |
241.0 |
-7.71 |
250 |
15.90 |
237.3 |
-7.89 |
|
260 |
|
|
|
260 |
|
|
|
|
270 |
|
|
|
270 |
16.00 |
242.0 |
-7.87 |
|
280 |
|
|
|
280 |
|
|
|
|
290 |
|
|
|
290 |
16.13 |
238.3 |
-7.67 |
|
300 |
16.35 |
237.6 |
-7.44 |
300 |
16.20 |
235.6 |
-7.56 |
|
310 |
16.37 |
236.3 |
-7.40 |
310 |
16.26 |
233.8 |
-7.47 |
|
320 |
16.40 |
235.0 |
-7.35 |
320 |
16.34 |
232.5 |
-7.36 |
|
330 |
16.41 |
233.8 |
-7.32 |
330 |
16.39 |
232.6 |
-7.31 |
|
340 |
16.43 |
232.6 |
-7.27 |
340 |
16.43 |
233.5 |
-7.29 |
|
350 |
16.44 |
231.6 |
-7.25 |
350 |
16.46 |
235.1 |
-7.29 |
|
360 |
16.45 |
230.7 |
-7.22 |
360 |
16.48 |
237.0 |
-7.30 |
|
370 |
16.45 |
230.1 |
-7.21 |
370 |
|
|
|
|
380 |
16.46 |
229.7 |
-7.19 |
380 |
|
|
|
|
390 |
16.45 |
229.5 |
-7.20 |
|
|
|
|
*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 |
|
2747 |
3220 |
19.36 |
241.1 |
-4.46 |
3.3 |
Per DL6WU formula |
|
3800 |
3420 |
19.60 |
234.1 |
-4.08 |
3.3 |
For max G/T |
|
1420 |
3300 |
18.29 |
220.4 |
-5.14 |
3.3 |
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) |
|
3800 |
3420 |
22.63 |
232.7 |
-1.04 |
3.3 |
|
1380 |
3300 |
20.66 |
220.7 |
-2.78 |
3.3 |
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) |
|
1380 |
3300 |
23.66 |
214.9 |
+0.34 |
3.4 |
|
3800 |
3420 |
25.64 |
232.8 |
+1.97 |
3.3 |
