In this paper, miniaturization of the asymmetrical profiled corrugated horn with low sidelobes, low cross-polarization, and good beam symmetry is presented. The miniaturized corrugated horn is designed at 2.48 GHz and optimizes the result between the frequency sweeps of 2 GHz to 4 GHz. At design frequency, the result of the S11 Parameter is -30.2966 dB, and the S11 Parameter remains below -20 dB between 2 GHz to 4 GHz. The asymmetrical profiled corrugated horn comprises the Gaussian Profiled Corrugation part and the most widely used Variable Depth Slot Mode Converter. The purpose of the mode converter is to generate hybrid mode in the corrugated horn antenna. The length of the asymmetrical profiled corrugated horn antenna after applying the miniaturization technique is only 3.5λ long. The designed horn full-fill the number of S-Band applications such as Satellite communication, Radio astronomy, Weather Radar, Surface ship radar.

In this chapter, the novel design of the corrugated horn antenna is presented. The axially corrugated Gaussian profiled horn is a dual profiled corrugated horn antenna. The corrugated horn is a novel design for S-band applications. The corrugated horn has a length of 2.6λ and an aperture radius of 1.3λ only. The S -parameter and cross-polarization of the novel corrugated horn are better than −20 dB for the whole S-band. The novel corrugated horn is compact in size with broader bandwidth performance.

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