ANTENNA Q204G2XL8
4 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) |
|
4 |
1045 |
10.48 |
18.34 |
21.51 |
14.38 |
54.8 |
62.9 |
316.4 |
-14.55 |
2.9 |
WORKING CONDITION:
|
Frequency for SWR=1.5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
|
|
Lowest |
Highest |
||
|
142.400 |
146.500 |
50.0 |
1.04:1 |
DIMENSIONS:
|
|
Ref |
De1 |
D1 |
D2 |
|
|
|
All elements made of Al tubes Ǿ8 mm The height of the rectangles is 470 mm All dimensions given in milimetres |
|
Pos |
0 |
244 |
612 |
1045 |
|
|
|
|
|
Length |
660 |
603 |
583 |
555 |
|
|
|
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) |
|
|
Q204G2XL8 |
0.50 |
8.33 |
50.0 |
1.04:1 |
2.64 |
1.88 |
14.34 |
2.9 |
258.4 |
-7.63 |
|
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 |
||||||||||
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 |
|
2260 |
1994 |
16.49 |
267.5 |
2.9 |
-7.78 |
Per DL6WU formula |
|
2640 |
1880 |
16.49 |
258.4 |
2.9 |
-7.63 |
For max G/T |
|
1460 |
1600 |
15.11 |
246.8 |
2.9 |
-8.81 |
For lowest temperature |
Patterns for lowest temperature
Patterns for max G/T
