Computer optimised wideband dual-mode horn

A wideband dual-mode horn has been manufactured from a design using mode matching analysis software embedded within an automatic optimisation loop. The horn consists of a smooth-walled conical horn section with a mode transducer comprising a number of optimised cylindrical waveguide steps. The final breadboard model achieves a peak cross-polarisation level of less than or equal to -30 dB over a 20% bandwidth.