Traditionally, the corrugated horn has been the preferred architecture where a high-performance horn is required to feed a reflector antenna or for directive radiation (DR). At microwave frequencies these horn types have reasonable price and are easy to manufacture.

However, at millimeter-wave frequencies the decreasing dimensions begin to pose real manufacturing difficulties and extremely high prices, then other solutions are preferred. To avoid these difficult manufacturing issues and to reduce manufacturing costs while performance is not compromised, the smooth-walled (spline) horn become a very interesting alternative solution.

At EOSOL we have experience developing spline profile horn antennas operating from X-band up to mmW frequencies (330GHz) for applications such as communications or radioastronomy.