Waveguide horn antenna array and radar device
First Claim
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1. A waveguide horn antenna array comprising:
- a feed waveguide; and
a plurality of horn antennas, each horn antenna having a coupling waveguide with an electromagnetic wave propagation direction perpendicular to an electromagnetic wave propagation direction of the feed waveguide, and having a horn portion coupled to a first end portion of the coupling waveguide opposite the feed waveguide, wherein the plurality of horn antennas are set in a predetermined arrangement relative to the feed waveguide, and wherein a second end portion of the coupling waveguide, opposite the first end portion, is at least partially protruded into the feed waveguide in a direction perpendicular to an extending direction of the feed waveguide.
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Abstract
A conductor member contains a linear feed waveguide extending in a fixed direction and a plurality of horn antennas coupled to the feed waveguide and set at an interval of about one half of a wavelength in the extending direction of the feed waveguide. The horn antennas are formed by horns and coupling waveguides, and the coupling waveguides are set so as to partially enter the feed waveguide. When the size of the spatial coupling portion formed by the entrance is changed, the degree of coupling between the feed waveguide and each of the coupling waveguides changes.
27 Citations
11 Claims
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1. A waveguide horn antenna array comprising:
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a feed waveguide; and
a plurality of horn antennas, each horn antenna having a coupling waveguide with an electromagnetic wave propagation direction perpendicular to an electromagnetic wave propagation direction of the feed waveguide, and having a horn portion coupled to a first end portion of the coupling waveguide opposite the feed waveguide, wherein the plurality of horn antennas are set in a predetermined arrangement relative to the feed waveguide, and wherein a second end portion of the coupling waveguide, opposite the first end portion, is at least partially protruded into the feed waveguide in a direction perpendicular to an extending direction of the feed waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification