Fig. 9. Snapshot of the assembly instructions for the construction of the Pyramidal Horn antenna at 2.45 GHz.

The resulting pyramidal horn constructed with recycled materials is shown in Fig. 10.

Fig. 10. General view of the Pyramidal Horn (top left), aperture (top right), interconnection between the horn and the feeding waveguide (bottom left) and feeding waveguide (bottom right).

The performance of the pyramidal horn has been tested in the laboratory. The matching of the antenna (Fig. 11) has been measured using a network analyzer and the radiation pattern (Fig. 12) has been measured inside an anechoic chamber. The measured radiation patterns are compared to the theoretical ones calculated with the expressions (3) and (4). Agreement between measurements and simulations has been achieved.

Voltage to operate the magnetron,

3000-4000V