SLOT ARRAY ANTENNA
A slot array antenna (1) including a waveguide (2) and a horn (3) is disclosed. The waveguide (2) has a first surface (21) including multiple slots (22) arranged along a longitudinal direction of the first surface to radiate radio waves. The width of the first surface (21) in the lateral direction i...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A slot array antenna (1) including a waveguide (2) and a horn (3) is disclosed. The waveguide (2) has a first surface (21) including multiple slots (22) arranged along a longitudinal direction of the first surface to radiate radio waves. The width of the first surface (21) in the lateral direction is greater than half of a wavelength of the radio waves. The horn (3), fixedly attached to the waveguide (2), enlarges towards a radiation direction of the radio waves. The horn (3) has upper and lower portions (32 and 33) bent inwards twice with respect to a lateral direction of the first surface (21) to form first and second narrow openings (31 and 34). An opening width of the first narrow opening (31) is less than the width of the first surface. An opening width of the second narrow opening (34) is less than or equal to one fifth of the wavelength. Thus, a side lobe generated due to horizontal polarization of the radio waves is suppressed. |
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