MURAL - Maynooth University Research Archive Library



    Analysis of diagonal horns through Gaussian-Hermite modes


    Withington, Stafford and Murphy, J.Anthony (1992) Analysis of diagonal horns through Gaussian-Hermite modes. IEEE Transactions on Antennas and Propagation, 40 (2). pp. 198-206. ISSN 0018-926X

    [img]
    Preview
    Download (719kB) | Preview


    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...



    Add this article to your Mendeley library


    Abstract

    The radiation characteristics of diagonal horns are investigated by means of Gaussian-Hermite modes. It is shown that, for reasonably long horns, the beamwidths in the principal and 45 degrees planes are equal to within 10%, and all sidelobes are below -15 dB. It is also demonstrated that the phase center of a diffraction-limited horn is close to the aperture, whereas the phase center of a constant-beamwidth horn is behind the throat. The maximum coupling to the lowest order copolar Gaussian mode is 84%, and the total amount of power coupled into the cross-polarized lobes is 9.5%. More significantly, the aperture efficiency of a Cassegrain antenna fed by a diagonal horn has a maximum value of 81%, which compares with 87% for a corrugated horn. The maximum efficiency is achieved when the aperture of a diffraction-limited horn is placed at a confocal tertiary focus, although a secondary focus gives an aperture efficiency that is only 10% lower, suggesting that diagonal horns are suitable for focal-plane arrays.

    Item Type: Article
    Additional Information: Cite as: S. Withington and J. A. Murphy, "Analysis of diagonal horns through Gaussian-Hermite modes," in IEEE Transactions on Antennas and Propagation, vol. 40, no. 2, pp. 198-206, Feb. 1992, doi: 10.1109/8.127404.
    Keywords: Gaussian processes; Diffraction; Manufacturing; Millimeter wave technology; Optical propagation; Aperture antennas; Horn antennas; Millimeter wave circuits; Machining;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 14277
    Identification Number: https://doi.org/10.1109/8.127404
    Depositing User: Dr. Anthony Murphy
    Date Deposited: 29 Mar 2021 14:48
    Journal or Publication Title: IEEE Transactions on Antennas and Propagation
    Publisher: Institute of Electrical and Electronics Engineers
    Refereed: Yes
    URI:

    Repository Staff Only(login required)

    View Item Item control page

    Downloads

    Downloads per month over past year