天线和铁塔
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做个EME天线阵 432MHZ,23单元x4,可以EME,可以打卫星,可以中日俄韩VU试验。

2311082

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以下为天线的原资料,来自鼎鼎大名的DK7ZB。


23-Element-28Ohm- DK7ZB-Yagi for 432MHz
Gain 16,9 dBd            Boom 5,7 m
updated data 18-July-2010
Group of 8x23-Element-Yagis stacked at
HA5KDQ
QTH in JN97LN, 500m high
Tnx photos to Simon, HA5IW
The Yagi built by Sandro, DD3SP
The 23-El.-Yagi is assembled by
Graeme, VK3GOM
and crew.
He reports from good performance and F/B and pattern similiar to the plotted pictures.
SWR <= 1.2 between 432 and 433 MHz
4x23-Element
Best stacking distances 2,05m vertical, 2,10m horizontal
Contest-Team OL6R
Photo: Jarek, OK2BJL
Gain 23dBd without stacking losses
Beamwidth:
For 3dB 8,8° hor , 8,8°ver
Measured SWR of a single 23-Element-Yagi
Kontest-Team OL6R


4x23-El.-Yagi
at Clubstation
SP3YDE
(Tnx Foto to Dariusz, SP3TLJ)

The EME-Group of
Mario, EB5HRZ
4x12.-El.-144 MHz
4x7-El.-144 MHz
4x23-El.-432 MHz
A very good solution ist the mounting of 4x7-El.-Yagi vertical in front of the stacking harness. So Mario needs no glassfibre for the boom and has an x-pol antenna!
Element
El.-Position

El.-Length (10 mm)
El.-Length (8mm)
Ref
0mm
338 mm
339 mm
Rad
115 mm
319 mm (12 mm)
321mm (12mm)
D1
185 mm
302 mm
307mm
D2
355 mm
290 mm
294mm
D3
585 mm
281 mm
285mm
D4
855 mm
274 mm
279mm
D5
1135 mm
271 mm
276mm
D6
1430 mm
268 mm
273mm
D7
1725 mm
267 mm
272mm
D8
2025 mm
264 mm
269mm
D9
2325 mm
263 mm
268mm
D10
2625 mm
261 mm
267mm
D11
2930 mm
259 mm
266mm
D12
3235 mm
257 mm
264mm
D13
3540 mm
257 mm
264mm
D14
3845 mm
257 mm
262mm
D15
4150 mm
258 mm
262mm
D16
4445 mm
257 mm
262mm
D17
4730 mm
258 mm
263mm
D18
4995 mm
258 mm
263mm
D19
5220 mm
257 mm
262mm
D20
5470 mm
260 mm
263mm
D21
5670 mm
257 mm
262mm

[ 此帖被BA7KW在2016-12-14 14:22重新编辑 ]
2016-12-14 12:36:41
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