SHF-Design precision Yagi antennas |
On this page you will find:
CAD manufactured high
performance antennas - Made in Germany -:
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The antennas have an
very high f/b ratio because of the use of 8
reflectors. This is in particular important for
high-gain yagis: even the highest gain gets
useless if unwanted signals or interferences are
being received from the back side of the
antenna. EME or SAT freaks enjoy our antennas
due to the low backward noise scatter (from the
surface of the earth). All nuts, bolts and
washers are manufactured of stainless steel. For
those antennas with support strut also the mast
clamp itself is made of stainless steel (where
else do you find this?). The antennas are delivered pre-mounted with all elements already in place. They can be assembled in about 10 minutes; you don't have to read the manual (which is provided of course...) and it does not take an engineering approach to install the antenna and get into the air... |
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SHF-Design Dipole |
Mast clamp |
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Radiating elements from 1200MHz - 2400 MHz. Of course with Teflon N-connectors and a sealed balun transformer. | Mast clamp of the SHF-long yagi | |
Reflector |
CNC drilling machine |
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![]() As one can see the nut holes for the boom are drilled by a computer-aided robot; each and every boom having the highest possible precision. |
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The multi-reflectors (8x) guarantee highest f/b ratio. | ||
CNC cutting robot |
Assembly robot |
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![]() Each element is cut down to a precision of 1/10th of a mm. |
![]() As can be seen here the pre-manufactured elements are being forced into the center position and are automatically fixed to the boom. |
SHF 2367 |
As far as we know this is the longest 23 cm antenna manufactured in series
production. The antenna has 22 λ in length and almost 20 dBD in gain, it's a
high tech/high performance product. All mounting parts and nuts are made of
stainless steel. Due to the 8x-reflector the antenna shows a very high front to
back ratio (f/b). At 19.9 dBD gain the antenna has a gain of 22 dBi (over
isotropic). The side lobe attenuation is 17 dB. The entire performance of the
antenna follows the physical laws and is optimized by CAE-design. The E- and
H-plane 3-dB beamwidth are practically equal and facilitates therefore the
stacking and combination of several identical yagis to form a high gain antenna
array. The antenna covers the entire 23 cm band and does not display any
de-tuning effects caused by rain or wind. The support strut is designed so that
the antenna does not mechanically deform in the horizontal plane.
We offer a replacement dipole in case this would ever become necessary (Part No.
18400.01), and also a special dipole which is mounted upside down to facilitate
2x2 H setups and has a 180° phase difference to the normal dipol (Part No.
18400.02).
Order No. | ||
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18405 | SHF-2367 | 189.80 |
18400.01 | Spare dipole | 32.60 |
18400.02 | Markup for special dipole 180° | 13.50 |
SHF 2344 |
The new design "SHF 2344" is the 'little brother' of the 5 m version and is
quite a 'hummer' with its 3 m length. The antenna has a high bandwidth and may
be used just as well for ATV operation. Of course, this antenna is supplied
fully assembled; the awkward manual mounting process has been replaced by the
assembly robots.
We offer a replacement dipole in case this would ever become necessary (Part No.
18400.01), and also a special dipole which is mounted upside down to facilitate
2x2 H setups and has a 180° phase difference to the normal dipol (Part No.
18400.02).
Order No. | ||
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18403 | SHF-2344 | 156.00 |
18400.01 | Spare dipole | 32.60 |
18400.02 | Markup for special dipole 180° | 13.50 |
SHF 2328 |
The "SHF 2328" model is the ideal start-up model for 1.3 GHz; the antenna is
a mere 1.5 m long and has 16 dBD gain. The mechanical data is almost identical
to the other SHF-antennas. The electrical characteristics are absolutely
identical with the SHF long yagis except for the 3-dB beamwidth and the gain.
We offer a replacement dipole in case this would ever become necessary (Part No.
18400.01), and also a special dipole which is mounted upside down to facilitate
2x2 H setups and has a 180° phase difference to the normal dipol (Part No.
18400.02).
Order No. | ||
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18401 | SHF-2328 | 130.30 |
18400.01 | Spare dipole | 32.60 |
18400.02 | Markup for special dipole 180° | 13.50 |
SHF 1367 |
Ties is the super yagi for the 13cm-band. At such high frequencies the
antenna design turns out to be quite complicated. All tolerances must be
observed down to the minimum. The length of the elements changes in just some
1/10th mm steps. It takes many calculations and approximations to optimize the
design of the boom and the elements which are thick compared to the wave length;
many corrections must be tested and implemented until the optimal mechanical
dimensions are found.
As described before all yagis of SHF-Design are manufactured and assembled
automatically; the boom will be supplied with all elements assembled.
Consequently, the tolerances coming to play are kept down to the absolute
minimum compared to the good old 'manual assembly' done by the user. The 13cm
yagis all have 6 reflectors and show a performance of 25 dB f/b ratio.
We offer a replacement dipole in case this would ever become necessary (Part No.
18410.01), and also a special dipole which is mounted upside down to facilitate
2x2 H setups and has a 180° phase difference to the normal dipol (Part No.
18410.02).
Order No. | ||
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18415 | SHF-1367 | 203.00 |
18410.01 | Spare dipole | 32.60 |
18410.02 | Markup for special dipole 180° | 13.50 |
SHF 1340 |
The super yagi for the 13 cm-band with fore-mast mounting. Thus, mounting
anywhere on a mast (and not necessarily on top of the mast) is possible. The
mechanical set-up becomes quite simple. By utilizing high quality/low loss
coaxial cable and the shortest possible feedline the lower gain of the
13cm-super yagi can be compensated in many cases.
We offer a replacement dipole in case this would ever become necessary (Part No.
18410.01), and also a special dipole which is mounted upside down to facilitate
2x2 H setups and has a 180° phase difference to the normal dipol (Part No.
18410.02).
Order No. | ||
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18410 | SHF-1340 | 133.40 |
18410.01 | Spare dipole | 32.60 |
18410.02 | Markup for special dipole 180° | 13.50 |
23cm | 13cm | |||||
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Type SHF... | 2328 | 2344 | 2367 | 1340 | 1367 | |
Frequency | 1240-1300 | 2300-2450 | MHz | |||
No. of elements | 28 | 44 | 67 | 40 | 67 | |
Gain ISO | 17,5 | 20,2 | 22 | 18,7 | 22,1 | dB |
Gain dBD | 15,4 | 18,1 | 19,9 | 16,6 | 20 | dBD |
Max. Power | 500W | W | ||||
Length | 1,6 | 3 | 5,1 | 1,6 | 3 | m |
electr. Length | 6,5 | 13 | 22 | 9,3 | 22,7 | λ |
HPBW | 21,8° | 16,5° | 13,7° | 18,8° | 13,2° | |
Side lobes | -17 | -17 | -17 | -16 | -16 | dB |
Front/Back ratio | 26 | 26 | 27 | 25 | 25 | dB |
Stacking distance | 570 | 751 | 913 | 391 | 522 | mm |
SWR typ. | 1,2 | 1,2 | 1,2 | 1,2 | 1,2 | |
Windload at 120 km/h | 38 | 86 | 134 | 55 | 90 | N |
Max. mast diameter | 52 | 52 | 52 | 52 | 52 | mm |
Transport Length | 1,6 | 1,6 | 2,65 | 1,6 | 1,55 | |
Dipole connector | N jack (female) | N jack (female) | ||||
Fore-mast mount | Yes | Yes | ||||
Strut | Yes | Yes | Yes | |||
Order No. | 18401 130.30 | 18403 156.00 | 18405 189.80 | 18410 133.40 | 18415 203.00 |
In case the antennas will be stocked H-shaped it is recommended to order
optional mirrored dipoles (with 180 degrees phase shift) for use as the two
lower antennas. These two antennas should be mounted upside down with the
connectors facing upwards. Then it is possible to use absolutely symmetrical
feedlines and to put the power splitter right in the center of the array.
Please bear in mind: This is an option at extra cost; the special dipoles will
be supplied instead of the standard dipoles!
Order No. | ||
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18400.02 | Upgrade special dipole 23cm 180° | 13.50 |
18410.02 | Upgrade special dipole 13cm 180° | 13.50 |
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Diagram 1: dry antenna Diagram 2: slightly humid antenna Diagram 3: humid antenna |
The leftmost side of the picture displays the measurement frequency 1200 MHz
and the rightmost side of the picture represents approx. 1365 MHz. The three
curves were taken at different humidity levels of the antenna. The lowest curve
was taken with a wet antenna and the dipole being totally submerged in water. As
you can see the antenna maintains the mid-band resonance as per specification.
Only the gain drops a little bit over 1300 MHz.
Alle prijzen zijn inclusief BTW., maar exclusief verzendkosten.
Tussentijdse prijswijzigingen en typefouten voorbehouden.
Fabrikanten kunnen specificaties en uitvoeringen wijzigen.