| 摘要 |
A horn array antenna for dual linear polarization is provided to reduce a height and to maintain or improve performance by forming a pair of protrusion guides on an inner surface of an inclined unit of a horn. A horn array antenna(501) for dual linear polarization includes a horn(510), a first polarization guide(530), and a second polarization guide(550). The horn guides an inputted or outputted electromagnetic wave. The first polarization guide is connected to one end of the horn and has a plurality of adjacent paths to guide a first polarization. The second polarization guide is connected to the one end of the horn, in parallel with the first polarization guide, and guides a second polarization having an electric field direction perpendicular to the first polarization. The horn has an inclined unit and a tubular polarization filtering unit. The inclined unit is tapered along a proceeding direction of the electromagnetic wave and has at least one protrusion protruded from an end of an inner opening toward a center region. The polarization filtering unit connects the inner opening and the first polarization guide.
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