SHF-23xx Monoband Yagis for 1296 MHz

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Top Features

  • Power handling up to 500 watts
  • N jack
  • available in 3 versions

Supply Scope

  • SHF Yagi antenna
  • Balun
  • Lower strut (only SHF-2344 and SHF-2367)
  • Manual

Technical description

The SHF Yagis

The 23 and 13 cm bands belong to the UHF bands with the highest frequencies and offer very unique and fascinating propagation conditions. Here, antennas with high gain are essential to achieve good results in contests or DX. Due to the relatively short wavelength, the demands on precision in antenna construction are significantly higher than, for example, on 2m. Here, an error of a few millimetres has a very significant effect and can lead to poor matching or non-optimal gain.

The WiMo SHF Yagis for 23 and 13 cm are based on the proven design of DL6WU. The square boom tubes are drilled in one piece on an automatic production machine to keep the tolerances as low as possible. In the same way, the aluminium elements are automatically sawn with a maximum length tolerance of 0.1mm. These elements are then inserted and fixed into the boom with precise centring. The dipole uses a balun made of semi-rigid coaxial cable, making it very robust and accurate to manufacture. In addition, the connections of the balun are covered with protective lacquer and the connection box is sprayed waterproof. Of course, the dipoles for the WiMo Yagis have an N-connector. For 'hanging' systems, the baluns are also offered with 180° phase reversal, which simplifies the laying of coaxial cables for stacked antenna systems considerably. The dipoles are also offered individually as spare parts.

To keep the noise caused by side lobes low, a reflector with 8 elements is used. This ensures a good gain/temperature ratio, which is particularly important for EME and satellite operation. Here, the antennas are also adjusted in elevation so that the end points to the ground. And a lot of 'man-made noise' comes from the ground. The WiMo SHF antennas are delivered pre-assembled, only the boom parts have to be mounted. The shortest designs of the Yagis are designed for foremast mounting, the longer models have a downstand and have to be installed on the end of the rotating tube or a boom.

Application description

The SHF-2328 Yagi

The SHF-2328 Yagi is the smallest of the 23cm Yagis produced by WiMo. Nevertheless it offers a high gain of 17 dBi. With a length of only 160cm it fits into any antenna system (foremast mounting) and offers a good entry into the world of 23cm. If you drill cross holes in the boom, you can also mount this antenna vertically, e.g. for relay operation. The dipole with N socket can handle up to 500W.

The SHF-2344 Yagi

The SHF-2344 Yagi with its 3m length and 20 dBi gain is perfectly suited to be operated individually or as a group. The bandwidth of the antenna covers the entire 23cm band without loss, even in rain it does not detune. The dipole (N-socket) can handle up to 500W and is also available in a version with 180° phase shift, which simplifies construction and cable routing for group antennas.

The SHF-2367 Yagi

To our knowledge, one of the longest industrially manufactured 23cm antennas! With 22 λ length and almost 20 dBD gain, it is a top product of the antenna industry. All mounting parts and screws are made of stainless steel. Due to the 8-fold reflector, the antenna has a very high front-to-back ratio. With 19.9 dBD gain, corresponding to 22 dB above the omnidirectional antenna, and a side lobe suppression of 17 dB, it follows exactly the physical laws for gain-optimised antennas. E- and H-opening angles are almost the same and facilitate interconnection of several Yagis to form groups with the highest gain. The antenna covers the entire 23cm band and does not tune itself out of band even in rain. The beam is designed so that the antenna sags very little. A dipole is of course included. The maximum transmit power is 500W.

For the 23cm Yagis we offer a spare dipole (article 18400.01) in case one is needed. Furthermore, a special dipole is available as an option, which is mounted 'upside down' to facilitate H-sticks (article 18400.02).

Technical Data
Product Name SHF-23xx Monoband Yagis for 1296 MHz
Antenna Type Directional Antenna
Design of antenna Yagi
Antenna Guying No
Band 23cm
Frequency Range 1240 - 1300 MHz
Max. Power [W] 500 W
Polarisation Hor or Vert.
Balun Included Yes
Max. Mast Diameter [mm] 52
Max. Windspeed (km/h) 120