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Fig. 1. General view of the structure
Microstrip-to-waveguide transition
Fig. 3. Optimisation progress
Fig. 2. Objective and variables defined for optimisation
The objective function to be used in optimization is |S11| and we will try to get the input reflection below 0.01 in the frequency sub-range between 10 and 12GHz. There are six variables used in optimisation.
Waveguide horn - rectangular waveguide horn in a metal block (vertical) with absorbing and NTF
It concerns a flat waveguide horn excited by the dominant waveguide mode. An air-filled horn is assumed to be radiating from a block of metal (shown grey, semi-transparent). In the optimisation process, we will be changing the horn length (in vertical z-direction) as well as its width (in x-direction) and height (in y-direction). We will try to achieve good antenna gain for the frequency 24 GHz in the lobe of 0 18 (in zx-plane) as well as good matching with |S11|<0.08 in the frequency range from 23.5 to 24.5 GHz.
Fig. 4. General view of the structure
Fig. 5. Optimisation progress
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Axisymmetrical corrugated horn - V2D example
Four objective functions are used in optimisation:
|S11| in the band of 10.5 to 11.5 GHz is supposed to be as low as possible but any value below 0.05 is acceptable
the Copolar45 relative gain in the range of angles between 0 and 45 should be higher than 0.3
the Copolar45 relative gain in the range of angles between 45and 180 should be smaller than 0.33
the Crosspolar45 relative gain in the range of angles between 0 and 180 should be smaller than 0.05
Fig. 6. Axisymmetrical corrugated horn antenna model.
Fig. 7. Optimisation progress
discover accurate EM modelling