A rectangular corrugated feed horn

Circular polariser for use in a gyro‐travelling wave amplifier

“…2 indicates that, although they provide good circular polarisation at a specific frequency, the elliptical converter has a limited broadband performance. Circular and non‐circular corrugated waveguides are used in application such as launching antennas in spacecraft and radar applications [22–27]. In these situations the waveguide is composed of a series of thin slots or irises, which provide the corrugation Fig.…”

Feed Antennas

“…Corrugations in the two walls parallel to the H -plane can be used to taper the field in the E-plane and thereby reduce the sidelobes in that plane. Horns with corrugations on four faces were described first by Bryant [53] with the aim of producing circularly polarized radiation with low sidelobes [54]. The main advantage of the rectangular corrugated horn is that the pattern can be shaped in both planes for feeding reflectors that are required to give dual-polarized rectangular or elliptical shaped beams [18,54,55].…”

“…Horns with corrugations on four faces were described first by Bryant [53] with the aim of producing circularly polarized radiation with low sidelobes [54]. The main advantage of the rectangular corrugated horn is that the pattern can be shaped in both planes for feeding reflectors that are required to give dual-polarized rectangular or elliptical shaped beams [18,54,55]. The disadvantages compared with a circular corrugated horn are its comparatively narrow bandwidth, higher cross polarization, difficulty of manufacture, and higher weight.…”

“…Sometimes pattern control is difficult. This can be improved by filling the corners where the corrugations meet [54,56]. The bandwidth and poor cross polarization of the rectangular corrugated horn are due to the generation of a higher-mode slow wave, which is predicted in the rigorous analysis of the horn [56].…”

E‐plane radiation pattern analysis of rectangular horn antennas with V‐shaped corrugations by UTD‐PO formulation

“…At present, corrugated horn antennas play a very important role in the development of current and future communication systems, due to their symmetric radiation patterns compared to conventional horns, low cross‐polarization, low sidelobes and back‐lobes, and broadband performance [ Mentzer and Peters , 1976; Borgioli et al , 1997; Bird , 1991; Baldwin and Mcinnes , 1975; Clarricoats and Olver , 1984; Mentzer et al , 1975]. However, when it comes to corrugated horns placed in the mm‐band and below (with several corrugations per wavelength), the analysis of their radiation patterns is usually based on complex numerical techniques which can result in high computational cost [ Peterson et al , 1998; Salazar‐Palma et al , 1991].…”