ANTENNA X21205XL4Q
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 |
13.44 |
34.34 |
- |
16.14 |
44.5 |
38.1 |
235.8 |
-10.29 |
4.5 |
WORKING CONDITION:
|
Frequency for SWR=1.5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
||
|
Lowest |
Highest |
Bandwidth |
||
|
141.800 |
146.800 |
5.000 |
199.2 |
1.14:1 |
DIMENSIONS:
|
|
Ref |
De |
D1 |
D2 |
D3 |
D4 |
D5 |
Dimensions given in milimetres Diameter of elements 5 milimetres No boom correction included.
|
|
Pos |
0 |
238 |
402 |
754 |
1194 |
1742 |
2305 |
|
|
Length |
1016 |
776 |
919 |
927 |
937 |
927 |
901 |
|
|
Height |
0 |
±240 |
±230 |
±390 |
±520 |
±595 |
635 |
CONSTRUCTION OF RADIATOR
H = 776
V = 240
Ø= 5 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 |
|
X21205XL4Q |
1.11 |
11.29 |
199.2 |
1.14:1 |
3.70 |
3.42 |
17.39 |
4.5 |
238.2 |
-4.23 |
|
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 |
14.60 |
225.2 |
-8.97 |
110 |
|
|
|
|
120 |
14.81 |
222.3 |
-8.71 |
120 |
|
|
|
|
130 |
14.97 |
221.9 |
-8.54 |
130 |
|
|
|
|
140 |
15.11 |
222.7 |
-8.41 |
140 |
|
|
|
|
150 |
15.23 |
224.2 |
-8.32 |
150 |
|
|
|
|
160 |
15.34 |
226.3 |
-8.25 |
160 |
|
|
|
|
170 |
15.44 |
229.0 |
-9.20 |
170 |
|
|
|
|
180 |
15.54 |
231.9 |
-8.15 |
180 |
15.04 |
273.2 |
-9.34 |
|
190 |
15.62 |
234.8 |
-8.12 |
190 |
15.26 |
261.9 |
-8.94 |
|
200 |
15.71 |
237.6 |
-8.08 |
200 |
15.43 |
253.8 |
-8.65 |
|
210 |
15.79 |
240.0 |
-8.04 |
210 |
15.56 |
248.3 |
-8.43 |
|
220 |
15.86 |
241.9 |
-8.01 |
220 |
15.66 |
244.5 |
-8.26 |
|
230 |
15.94 |
243.2 |
-7.95 |
230 |
15.73 |
241.8 |
-8.15 |
|
240 |
16.01 |
243.9 |
-7.09 |
240 |
15.78 |
240.1 |
-8.07 |
|
250 |
16.08 |
244.1 |
-7.83 |
250 |
15.82 |
240.9 |
-8.04 |
|
260 |
16.14 |
243.9 |
-7.76 |
260 |
15.86 |
243.6 |
-8.05 |
|
270 |
16.19 |
243.2 |
-7.70 |
270 |
15.90 |
245.1 |
-8.03 |
|
280 |
16.24 |
242.4 |
-7.64 |
280 |
15.96 |
244.2 |
-7.96 |
|
290 |
16.27 |
241.3 |
-7.59 |
290 |
16.02 |
241.9 |
-7.86 |
|
300 |
16.31 |
240.0 |
-7.53 |
300 |
16.09 |
239.3 |
-7.75 |
|
310 |
16.33 |
238.7 |
-7.48 |
310 |
16.16 |
237.3 |
-7.64 |
|
320 |
16.36 |
237.4 |
-7.43 |
320 |
16.23 |
236.2 |
-7.55 |
|
330 |
16.37 |
236.2 |
-7.40 |
330 |
16.28 |
236.2 |
-7.50 |
|
340 |
16.39 |
235.0 |
-7.36 |
340 |
16.33 |
237.1 |
-7.47 |
|
350 |
16.40 |
233.9 |
-7.33 |
350 |
16.35 |
238.6 |
-7.47 |
|
360 |
16.40 |
233.1 |
-7.31 |
360 |
16.37 |
240.4 |
-7.48 |
|
370 |
16.41 |
232.5 |
-7.29 |
370 |
16.38 |
242.1 |
-7.50 |
|
380 |
16.41 |
232.4 |
-7.29 |
380 |
16.38 |
243.6 |
-7,53 |
*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 |
3187 |
19.27 |
246.0 |
-4.64 |
4.5 |
Per DL6WU formula |
|
3700 |
3420 |
19.54 |
238.2 |
-4.23 |
4.5 |
For max G/T |
|
1340 |
3300 |
18.12 |
221.1 |
-5.33 |
4.8 |
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 |
3420 |
22.57 |
236.0 |
-1.16 |
4.8 |
|
1340 |
3380 |
20.53 |
221.3 |
-2.92 |
4.8 |
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) |
|
1340 |
3380 |
23.55 |
217.7 |
+0.17 |
4.8 |
|
3700 |
3420 |
25.58 |
238.5 |
+1.80 |
4.8 |
