| 摘要 |
<p>A hollow waveguide group antenna comprises a hollow waveguide (13) extending in a direction in space and a plurality of chambers (15), each of which has a sending/receiving slit (16) and is coupled to the hollow waveguide (13) by a coupling slit (14). The sending/receiving slits (16) are distributed at a fixed distance from each other, and the distribution of the coupling slits (14) in said direction in space at the transversal hollow waveguide (13) is selected differently from the distribution of the sending/receiving slits (16) such that a wave propagating (13) at the working frequency excites the sending/receiving slits (16) with amplitudes and phases suitable for realizing a sector direction characteristic. The fixed distance is approximately 0.5 λ0 40 for a 90° sector direction characteristic and approximately 0.64 Xo for a 45° sector direction characteristic.</p> |
