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Compact Dual Offset Gregorian Antenna

The design of a compact dual offset antenna of Gregorian type at Ku band is described here. The feed horn operating from 10.7 GHz to 14.5 GHz is a small transversely corrugated type with optimised corrugation depths as shown in Figure 1.

The side and front views of antenna are shown in Figure 2 and Figure 3. The projected aperture diameter of the antenna is 1.1 m. Predicted far-field patterns at 10.7 GHz and 14.5 GHz are shown in Figure 4 and Figure 5.

Figure 1

FIGURE 1: Optimised corrugated horn profile.

Figure 2

FIGURE 2: Side view of the antenna.

Figure 3

FIGURE 3: Front view of the antenna.

Figure 4

FIGURE 4: Predicted far-field azimuthal pattern at 10.7 GHz.

Figure 5

FIGURE 5: Predicted far-field azimuthal pattern at 14.5 GHz.

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