Low Sidelobe Diagonal Horns
There are several applications where high gain and low sidelobes are required from an antenna. One major application is in radiometry work where the noise temperature of a target has to be measured with minimal contribution from sources outside the main beam, which can often be at a higher intensity. For example when attempting to measure the temperature of an object in the sky the antenna must reject higher noise contributions from the ground that would be received off the main beam.
Generally Gaussian or corrugated horns are considered for this task however they can be expensive and of restricted bandwidth, both factors arising from the horn's complex internal structure.
Diagonal horns give a very similar level of performance but are simpler to make and have a wider bandwidth.
Due to their simpler construction a wide variety of models are available, similar in range to the standard gain horns elsewhere on this site.
Please contact us if you have a specific request.
Features (Model number QDH12-18F23 )
- Frequency band 12 - 18 GHz. (Waveguide 18)
- High gain 24.2 dBi at 15 GHz.
- Smooth Gaussian style patterns with excellent sidelobe suppression.
- Near identical E and H plane patterns.
- Weatherproofed, pressure tight window on request.
- Wide variety of connectors available.
- Antenna test report including gain supplied with each horn.
|Frequency||12 - 18 GHz|
|Nominal Gain||23 - 25.5 dBi|
|Nominal Beamwidth||11.8 - 8.6 degrees (3 dB)|
||28.8 - 29.8 dB/m
|VSWR||< 1.2:1 WG18 (WR62) flange
|Power Handling||10 kW peak WG18 (WR62) flange|
|Construction||Aluminium / Composite Material
||166 mm x 166 mm (aperture) x 400 mm long
|Weight||2.24 kg (inc. mount plate)
||RAL 9016 Traffic White
|Temperature||-40 C - +70 C
12 GHz Pattern
15 GHz Pattern
18 GHz Pattern