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Aperture efficiencies of large axisymmetric reflector antennas fed by conical horns

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1 Author(s)
Murphy, J.A. ; Mullard Radio Astron. Obs., Cambridge

It is shown how the radiation patterns of conical horns can be understood in terms of Laguerre-Gaussian beam modes. This approach provides a simple method for calculating the horn radiation pattern as it propagates through a multielement optical system consisting of lenses or offset mirrors with large focal ratio and/or a small angle of incidence, and can be used in quantitatively determining aperture efficiencies for systems where conical horns are coupled to antennas via tertiary optics. The resulting aperture efficiency results and a practical quasioptical system fed by a conical horn are discussed

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Antennas and Propagation, IEEE Transactions on  (Volume:36 ,  Issue: 4 )