ANTENNA Q208C4XL8
8 ELE OBLONG ANTENNA MADE OF ALUMINUM TUBES Ø8 MM
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 |
4445 |
14.34 |
20.26 |
20.89 |
16.37 |
36.8 |
39.6 |
237.8 |
-9.42 |
3.8 |
WORKING CONDITION:
|
Frequency for SWR=1.5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
|
|
Lowest |
Highest |
||
|
142.700 |
146.000 |
50.0 |
1.03:1 |
DIMENSIONS:
|
|
Ref |
De1 |
D1 |
D2 |
D3 |
D4 |
D5 |
D6 |
All elements made of Al tubes Ǿ8 mm The height of the rectangles is 300 mm All dimensions given in milimetres |
|
Pos |
0 |
288 |
671 |
1302 |
2032 |
2826 |
3667 |
4445 |
|
|
Length |
811 |
753 |
724 |
686 |
666 |
648 |
630 |
615 |
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) |
||
|
WiMo WX220 XPOL |
2.13 |
11.23 |
202.0 |
1.08:1 |
2.94 |
2.94 |
17.44 |
8.4 |
300.8 |
-5.19 |
|
|
Gulf Alpha 9 |
2.13 |
11.62 |
203.3 |
1.15:1 |
3.26 |
2.97 |
17.64 |
4.6 |
266.2 |
-4.46 |
|
|
Gulf Alpha 9 XPOL |
2.13 |
11.60 |
203.9 |
1.15:1 |
3.12 |
3.12 |
17.62 |
5.0 |
267.6 |
-4.50 |
|
|
DJ9BV 2.1 |
2.13 |
11.89 |
44.9 |
1.30:1 |
3.33 |
3.04 |
17.87 |
5.8 |
255.2 |
-4.05 |
|
|
Q208C4XL8 |
2.13 |
12.19 |
50.0 |
1.03:1 |
3.76 |
3.24 |
18.23 |
3.8 |
243.2 |
-3.48 |
|
|
OZ5HF 9 |
2.16 |
11.52 |
38.0 |
1.15:1 |
3.21 |
2.92 |
17.47 |
3.0 |
272.6 |
-4.74 |
|
|
YU7EF 9 |
2.16 |
11.84 |
49.8 |
1.17:1 |
3.20 |
2.89 |
17.74 |
5.3 |
236.6 |
-3.84 |
|
|
F9FT 11 |
2.17 |
11.78 |
21.5 |
1.25:1 |
3.26 |
2.97 |
17.75 |
5.3 |
251.0 |
-4.10 |
|
|
CC 13B2 |
2.17 |
11.79 |
21.1 |
1.37:1 |
3.33 |
3.01 |
17.78 |
5.9 |
257.9 |
-4.18 |
|
|
K1FO 11 |
2.18 |
11.97 |
44.0 |
1.29:1 |
3.30 |
3.00 |
17.90 |
4.3 |
248.0 |
-3.89 |
|
|
CC 215WB |
2.19 |
11.78 |
17.4 |
1.47:1 |
3.36 |
3.07 |
17.78 |
6.6 |
266.6 |
-4.33 |
|
|
Vine 9 FD |
2.22 |
11.93 |
50.0 |
1.07:1 |
3.21 |
2.91 |
17.80 |
9.4 |
230.0 |
-3.67 |
|
|
Z(ohms) - measured on 144.100 MHz |
|||||||||||
DIAGRAMS (no loss included)
SWR DIAGRAMS (loss included for Al)
BEST DISTANCES FOR 4 ANTENNAS IN H-STACK
|
Horizontal distance (cm) |
Vertical distance (cm) |
G (dBi) |
TA (K) |
Tlos (K) |
G/T (dB) |
Remark |
|
3296 |
3071 |
20.24 |
238.6 |
3.8 |
-3.54 |
Per DL6WU formula |
|
3760 |
3240 |
20.38 |
243.2 |
3.8 |
-3.48 |
For max G/T |
|
2680 |
1420 |
18.35 |
219.1 |
3.8 |
-5.06 |
For lowest temperature |
Patterns for lowest temperature
Patterns for max G/T
