SHF YAGI ANTENNAS

The antennas have an enormous 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...

Technical Data	23 cm			13 cm		Meteosat
Type SHF...	2328	2344	2367	1340	1367	1633	1658
Frequency	1240-1300			2300-2450		1690-1700		MHz
Number of Elements	28	44	67	40	67	33	58
Gain ISO	17.5	20.2	22.0	18.7	22.1	18.4	20.8	dB
Gain dBD	15.4	18.1	19.9	16.6	20.0	16.3	18.7	dBD
Length	1.6	3.0	5.1	1.6	3.0	1.6	3.0	m
Electrical Length	6.5	13	22	9.3	22.7	8.5	18.7
3-dB Beamwidth	21.8°	16.5°	13.7°	18.8°	13.2°	19.6°	14.9°
Side Lobes	-17	-17	-17	-16	-16	-17	-17	dB
Front-to-Back-Ratio f/b	26	26	27	25	25	25	25	dB
Stacking Distance	570	751	913	391	522	483	638	mm
SWR typ.	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Wind Load (120 km/h)	38	86	134	55	90	48	95	N
Max. Mast-Ų	52	52	52	52	52	60	52	mm
Shipping Size	1.6	1.6	2.65	1.6	1.55	1.65	1.7
Dipole-Feed	N - Connector			N-Connector		N - Connector
Fore-mast
Support Strut

SHF-2367

As far as we know this is the longest 23 cm antenna manufactured in series production. The antenna has 22 lambda 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 if 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.

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.

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.

This 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.

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.

This is a low-profile antenna compared to a 60 cm parabolic dish. It has fore-mast mounting, 16.3 dBD gain and enables noise-free receiving of METEOSAT.

This is a further development of the 1st weather satellite antenna for METEOSAT II which was originally designed in 1984. It's a real alternative antenna compared to a parabolic dish of 1 m diameter; the electrical energy received is at least equal to the dish antenna! Today's state-of-the-art pre-amps and converter make the 3 m antenna sufficient for noise-free receiving of the weather pictures. Just set-up on the same mast as the TV antennas - and forget it. Built-in long durability. The 8 x reflector array and the extra long support strut are part of the standard package.