Aperture mode filter
AssigneeHoneywell International Inc.
InventorsJames P. Montgomery, Shawn D. Rogers, Michael G. Guler
Life of this patent
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Abstract
A mode filter for an antenna having at least one element aperture is provided. The mode filter includes at least one waveguide extension to extend the at least one element aperture, and at least one two-by-two (2×2) array of quad-ridged waveguide sections connected to a respective at least one waveguide extension. When the at least one waveguide extension is positioned between the at least one element aperture and the at least one two-by-two (2×2) array of quad-ridged waveguide sections, undesired electromagnetic modes of the antenna are suppressed.
Claims17
A mode filter for a horn antenna having at least one radiating element with at least one horn aperture, the mode filter comprising:
- at least one waveguide extension to extend the at least one element horn aperture;
- and
- at least one two-by-two (2×2) array of quad-ridged waveguide sections connected to the respective at least one waveguide extension, wherein, when the at least one waveguide extension is positioned between the at least one horn aperture and the at least one 2×2 array of quad-ridged waveguide sections, undesired electromagnetic modes of the horn antenna are suppressed, wherein a portion of at least one of the at least one 2×2 array of quad-ridged waveguide sections extends at least partially into the respective at least one of the at least one waveguide extension.
A horn antenna in which undesired electromagnetic modes are suppressed, the horn antenna comprising:
- an antenna-array of antenna radiating elements having a respective array of horn apertures;
- an extension-array of waveguide extensions adjacent to the array of horn apertures of the antenna-array of antenna radiating elements;
- and
- a quad-ridged-waveguide array of two-by-two (2×2) arrays of quad-ridged waveguide sections connected to the extension-array, wherein the extension-array is positioned between the quad-ridged-waveguide array and the antenna-array of antenna radiating elements, wherein a portion of at least one of the 2×2 arrays of quad-ridged waveguide sections extends at least partially into the respective at least one waveguide extension.
A method of suppressing undesired electromagnetic modes of a horn antenna including one or more antenna radiating elements, the method comprising:
- positioning one or more waveguide extensions adjacent to respective one or more horn apertures of the one or more antenna radiating elements;
- and
- connecting one or more two-by-two (2×2) arrays of quad-ridged waveguide sections to respective one or more waveguide extensions, so that portions of at least one of the one or more 2×2 arrays of quad-ridged waveguide sections extend at least partially into the respective at least one of the one or more waveguide extensions.
Dependencies are inferred from the claim text.