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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an
Special page devoted to
Ground Plane for the 40,-30,-20 and 17- meter
Bands
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ANTENTOP- 01- 2012, # 016 |
Ground Plane for the 40,-30,-20 and 17- meter Bands |
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By:
Vasiliy Samay,
R7AA Credit
Line: http://news.cqham.ru/articles/detail.phtml?id=1076 |
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The
antenna is very simple. It is just vertical radiator in 10- meter
length that is matched at the each working band by its own matching
unit that is switched on with help of relay. However to the design
I came not straight away. There were tried several multiband antennas
(for example, antennas from References
1 and 2) but for some reason no one of them did not satisfied
me. I could not get good SWR at each of desirable working bands
of the antennas. |
Friend
of mine, UA7A, ex UA6CW, advised to me to use the described below antenna.
He helped to me to calculate matching circuits for the antenna.
Figure 1
shows schematic of the antenna. Figure 2 shows schematic of the matching units
for 40,- 30,- 20 and 17- meter
Bands. To eliminate static from the antenna the vertical radiator
is grounded through pair resistors in 430- kOhm/2- Wtts. |
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Figure 2 Matching units for 40,-
30,- 20 and 17- meter Bands. |
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Last Updated:
January 19, 2020 12:44
