ANTENNA Y20808XL1
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 |
3465 |
13.24 |
21.74 |
23.06 |
16.80 |
40.4 |
46.2 |
253.3 |
-10.80 |
4.0 |
WORKING CONDITION:
|
Frequency for SWR=1,5 (MHz) |
Z (Ώ) at 144.100 MHz |
SWR at 145.000 MHz |
|
|
Lowest |
Highest |
||
|
141.000 |
146.300 |
200.0 |
1.06:1 |
DIMENSIONS:
|
|
Ref |
De1 |
De2 |
D1 |
D2 |
D3 |
D3 |
D4 |
D5 |
All elements made of Al tubes Ǿ8 mm All dimensions given in milimetres No boom correction included |
|
Pos |
0 |
140 |
340 |
429 |
752 |
1298 |
1979 |
2755 |
3465 |
|
|
Length |
1010 |
1010 |
836 |
943 |
945 |
921 |
897 |
883 |
867 |
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) |
|
|
G4CQM 10 UZ2 |
1.67 |
10.74 |
45.1 |
1.26:1 |
2.89 |
2.51 |
16.68 |
5.7 |
235.9 |
-4.90 |
|
DG7YBN 8 |
1.68 |
10.94 |
47.5 |
1.16:1 |
2.91 |
2.56 |
16.84 |
3.5 |
238.8 |
-4.79 |
|
I4GBZ 7 |
1.69 |
11.41 |
48.4 |
2.27:1 |
3.18 |
2.86 |
17.26 |
5.7 |
278.9 |
-5.04 |
|
Y20808XL1 |
1.75 |
11.09 |
200.0 |
1.06:1 |
3.32 |
2.50 |
17.00 |
3.7 |
240.1 |
-4.65 |
|
G0KSC 8LFA |
1.79 |
11.06 |
50.0 |
1.24:1 |
3.15 |
2.40 |
16.95 |
3.6 |
222.2 |
-4.37 |
|
W1JR 8 MOD |
1.80 |
11.14 |
50.0 |
1.14:1 |
3.07 |
2.75 |
16.99 |
5.3 |
256.7 |
-4.95 |
|
DJ9BV 1.8 |
1.80 |
11.34 |
77.5 |
1.34:1 |
3.16 |
2.80 |
17.28 |
5.5 |
261.2 |
-4.74 |
|
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 |
14.63 |
230.3 |
-8.98 |
|
110 |
|
|
|
110 |
14.80 |
224.6 |
-8.70 |
|
120 |
|
|
|
120 |
14.95 |
221.9 |
-8.49 |
|
130 |
14.61 |
265.6 |
-9.63 |
130 |
15.07 |
222.7 |
-8.39 |
|
140 |
|
|
|
140 |
|
|
|
|
150 |
14.97 |
254.8 |
-9.08 |
150 |
15.26 |
228.4 |
-8.31 |
|
160 |
|
|
|
160 |
|
|
|
|
170 |
15.24 |
249.9 |
-8.73 |
170 |
15.47 |
230.1 |
-8.13 |
|
180 |
|
|
|
180 |
|
|
|
|
190 |
15.47 |
248.2 |
-8.47 |
190 |
15.66 |
232.4 |
-7.99 |
|
200 |
15.58 |
248.2 |
-8.36 |
200 |
15.76 |
232.2 |
-7.88 |
|
210 |
15.69 |
248.5 |
-8.26 |
210 |
15.86 |
231.7 |
-7.77 |
|
220 |
|
|
|
220 |
15.96 |
231.4 |
-7.67 |
|
230 |
15.87 |
249.7 |
-8.09 |
230 |
16.06 |
232.1 |
-7.58 |
|
240 |
|
|
|
240 |
16.14 |
233.9 |
-7.54 |
|
250 |
16.03 |
251.2 |
-7.96 |
250 |
16.21 |
236.9 |
-7.52 |
|
260 |
|
|
|
260 |
16.28 |
240.7 |
-7.52 |
|
270 |
16.16 |
252.6 |
-7.85 |
270 |
16.33 |
245.1 |
-7.55 |
|
280 |
|
|
|
280 |
16.37 |
249.7 |
-7.59 |
|
290 |
16.26 |
253.6 |
-7.77 |
290 |
|
|
|
|
300 |
16.30 |
253.9 |
-7.74 |
300 |
|
|
|
|
310 |
16.33 |
254.2 |
-7.71 |
310 |
|
|
|
|
320 |
16.36 |
254.4 |
-7.69 |
320 |
|
|
|
|
330 |
16.38 |
254.5 |
-7.67 |
330 |
|
|
|
|
340 |
16.39 |
254.6 |
-7.66 |
340 |
|
|
|
|
350 |
16.40 |
254.6 |
-7.65 |
350 |
|
|
|
|
360 |
16.41 |
254.6 |
-7.64 |
360 |
|
|
|
|
370 |
16.41 |
254.5 |
-7.64 |
|
|
|
|
|
380 |
16.41 |
254.5 |
-7.64 |
|
|
|
|
*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.
BEST DISTANCES FOR 4 ANTENNAS IN H-STACK
|
Horizontal distance (cm) |
Vertical distance (cm) |
G (dBi) |
TA (K) |
G/T (dB) |
Remark |
|
3013 |
2651 |
19.18 |
246.3 |
-4.73 |
Per DL6WU formula |
|
3320 |
2500 |
19.15 |
240.1 |
-4.65 |
For max G/T |
|
3440 |
1260 |
17.93 |
221.9 |
-5.53 |
For lowest temperature |
STACKING DIAGRAMS FOR MAX G/T
STACKING DIAGRAMS FOR LOWEST TEMPERATURE
