See our new website at research.ict.csiro.au

Prototypes and Services - Orthomode Transducers

We have developed several Orthomode Transducer (OMT) designs that are used in radio astronomy and satellite earth stations.

These include:

  • Asymmetrical OMT
  • Symmetrical OMT
  • Quad-ridged OMT
The examples shown are the quadridged OMT and the asymmetrical OMT.

This particular asymmetrical OMT is a compact design suitable for applications covering the extended 3.4 to 4.2 GHz communications band.

The Quad-ridged OMTs have been designed to operate with a bandwidth up to 2.7:1 and can be used for applications operating up to 18 GHz.
Quad-ridged OMT
Compact asymmetrical OMT

OMT Type Bandwidth*
Asymmetrical OMT 1.25 : 1
Symmetrical OMT 1.5 : 1
Quad-ridged OMT 2.7 : 1
* VSWR at OMT ports better than 1.3 : 1